Các bạn có thể tải toàn bộ: Đề và đáp án vòng 1 thi Toán tiếng Anh (Math ViOlympic) lớp 4 năm học 2016 - 2017 tại đây.

Exam 1: Sắp xếp


Sắp xếp theo thứ tự bên dưới (từ trái qua phải, từ trên xuống dưới):

(3+4+5)x(2x2-4)	14:7	20-17	12:3
12-7	21:3	4x2	3x2+3
The smallest 2 - digit number	Twelve	4x5-7	4x3+2
6x6-21	1x10+6	The value of y if y-4=13	2x3x3
3x(5+2)	5x7-10	20x3:2	(12-7)x6+1
7x8-17	1/3 of 120	Result of 9x7+1	9x9-9
1/4 of 320	The smallest 3 - digit number	Result of 7x7+55	The value of y such that y+12=120
Sum of 36, 37 and 38	5x5x5	500:5+1500:5

Exam 2: Vượt chướng ngại vật


3 years 10 months = … months. Anwers: 46

Alice’s Pet rabbit weighs 500g. Jane’s Pet dog is ten times as heavy as Alice’s Pet rabbit. What is the weight of the dog? Anwers: 5kg

Calculate: 7 + 10 + 13 + 16 + … + M = ... (M is the 91st term of this sequence). Anwers: 12922

Bài giải chi tiết:

Calculate: 15 x 3 x 2 = ... Anwers: 90

Calculate: 93 - 72 : 8 = ... Anwers: 84

Calculate: 205 + 60 + 3 = ... Anwers: 268

Calculate: 432 + 9 x 4 = ... Anwers: 468

Calculate: 9876 : 6 x 6 = ... Anwers: 9876

Find the difference between the fourth and the first number in the sequence: 13; 14; 15; 16; 17; 18. Anwers: 3

Bài giải chi tiết:

Find the value of a if a : 4 = 12. Anwers: 48

Find the value of a if a x 5 = 125 x 5. Anwers: 125

Find the value of y if 36 - y = 20. Anwers: 16

Find the value of y if y + 8 = 57. Anwers: 49

How many 100g are there in 4kg? Anwers: 40

If 3 x y = 24, then y =... Anwers: 8

If 77 - b = 7, then b =... Anwers: 70

If y - (145+56) = 121, then y =... Anwers: 322

In 48 107, the digit “8” is in the … place. Anwers: Thousands

In the number 4926, the digit “2” is in the … place. Anwers: Tens

John had $84. He spent half of this amount on transport and ¼ of this mount on shirt. How much money did he spend altogether? Anwers: 63

Bài giải chi tiết:

Mary had 69 boxes of chocolate left after she had sold 110 boxes. If there were 6 pieces of chocolate in each box, how many pieces of chocolate had she at first? Anwers: 1074

Bài giải chi tiết:

Peter runs faster than Jack. Bob runs faster than Peter and Jack runs faster than John. Who runs the fastest? Anwers: Bob

Subtract 50 from 715. The result is… Anwers: 665

The perimeter of a square is 20cm. What is its area in centimeter square? Anwers: 25

Bài giải chi tiết:

Which number gives a remainder of 1 when divided by 3. Anwers: 22

Bài giải chi tiết:

Van made 30 paper flowers. She gave her friend 1/6 of the flowers. How many flowers did she give her friend? Anwers: 5

Exam 3: Đi tìm kho báu

7780 is … tens more than 4280? Anwers: 350

A group of 9 students shared a box of pen. After they had taken 7 pens each, there were 6 pens left. How many pens were at first? Anwers: 69

Bài giải chi tiết:

Anna sells an umbrella for $12 on a rainy day and $18 on a sunny day. How much more will cost to buy 3 umbrellas on a sunny day than on a rainy day? Anwers: 18

Bài giải chi tiết:

Fill the missing number in the blank. 2022 = 2000 + … + 2. Anwers: 20


Find the product of 576 and 5. Anwers: 2880

Find the sum of 24 hundreds, 4 tens and 14 ones. Anwers: 2454

Gina is 2 years 3 months older than her sister. Her sister is 7 years 8 months old. How old is Gina? (Express your answer in year and months). Anwers: 9 years 11 months


Grace wanted to buy a camera. She saved $1 on the 1st day, $3 on the 2nd day, $9 on the 3rd day and $27 on the 4th day. After 6 day Grace saved enough money to buy the camera. How much did the camera cost? Anwers: 364

Bài giải chi tiết:

I am a number. When I am multiplied by 6, the product is 10 greater than the sum 39 and 17. What number am I? Anwers: 11

Bài giải chi tiết:

John needs 2 weeks 4 days to make a teddy bear. How many days does she need to make 7 teddy bear? Anwers: 126

Mark has 49 stamps, Janes has 298 more than Mark. Alvin has 39 stamps less than Janes. How many stamps do Janes and Alvin have altogether? Anwers: 655

Mr Dung finished polishing his car at 1.25pm. He took 2 hours and 25 minutes to finish this task. At what time did start polishing his car? Anwers: 11am

Mr Foo spent 1 year 5 months in London and 2 years 7 months in Paris. How long was he in the two cities? Anwers: 48

Mrs Devi left her flat at 11.25 am and reaches Joe’s house at 1 pm. How long was the journey from her flat to Joe’s house? Anwers: 1 hour 35 minutes

Tammy bought a pair of pants for $25 and two shirts for $18 each. She gave the cashier two fifty dollar notes. How much change did she receive from the cashier? Anwers: 39

The greatest odd number that can be formed by all the digits 1, 2, 0 and 8 is… Anwers: 8201

The sum of 2 number is 807. If one of the number is 399, what is the other number? Anwers: 408

Toan took 4 weeks to complete his project. Lina took 23 days to complete her project. How much days faster did Lina take to complete her project than Toan? Anwers: 5

Today is Tuesday. What day was it 18 days ago? Anwers: Friday

Three poles measuring 140cm, 1m35cm and 1m65cm are placed in a straight line. What is the total length of the poles? Anwers: 4m40cm

What is the difference between 8909 and 2059? Anwers: 6850

What is the smallest odd number that can be formed using all the digits 3; 6; 1 and 4? Anwers: 1463

What is the value of 4 in 6408? Anwers: 400

Which of the following number is 1000 more than 7680? Anwers: 8680

Which one of the following is the shortest distance (8km3m; 8m3cm; 8km30m; 8m30cm)? Anwers: 8m3cm

Các bạn có thể tải toàn bộ: Đề và đáp án vòng 2 thi Toán tiếng Anh (Math ViOlympic) lớp 4 năm học 2016 - 2017 tại đây.

Exam 1: Tìm cặp bằng nhau

144=144x2:2	9043=9000+40+3
9304=9000+300+4	15630=3126x5
644:2=(125+36)x2	1000+2000=12000:4
1234+2766=9000-(3000+2000)	2222x2=8888:2
3126x4=5632+6872	5376+10722=6785+9313
7896-1206-500=7896-(1206+500)	8000:4=500x4
8000+3000+1000=7000+5000	8000+7000=12000+3000
82005=80000+2000+5	9304=9000+300+4

Exam 2: Đỉnh núi trí tuệ

35 x 456 = 400 x 35 + 35 x … What is the missing number? Answer: 56

89736 = 80000 + 9000 + ___ + 30 + 6. The missing number is… Answer: 700

After rounding off the result of a sum to the nearest hundred, the answer is 2500. Which of the following is most likely to be this answer? Answer: 24 hundred + 50


Compare: 5328 … 5283. Answer: >

How many even number are there between 4006 and 4022? Answer: 7

Bài giải chi tiết:

Fill in the blank with >; =; < 2 hours 30 minutes … 230 minutes. Answer: <

Find the value of P if P : 3 x 5 = 1500. Answer: 900

If 2 x a = 10 and 3 x b = 12, then 4 x a + 6 x b = … Answer: 44

If (a + 15) : 8 = 5, then a = … Answer: 25

If m = 23 then 123 - m = … Answer: 100


If x < 22 + 23 < x + 2, then x = … Answer: 44

It cost $15 to buy 3 books. If Nam want to buy 5 books, he must pay $… Answer: 25

Jaya is 19 years old. Six years ago her mother was three times as old as her. How old is her mother now? Answer: 45

Bài giải chi tiết:

Lan has 3 notebooks, her mother gives her 4 notebooks more. How many notebooks does she have altogether? Answer: 7

Of the 48 students, 21 are girls. How many more boys are there than girls? Answer: 6

Bài giải chi tiết:

Mr Nam is twice as old as his daughter. If he is 50 years old now, how old will his daughter be in ten years’ time? Answer: 35

Bài giải chi tiết:

The number of pens is twice the number of pencils in a stationery shop. The number of pencils is 6 times the number of  erasers in the shop. How many times is the number of pens as many as the number of erasers? Answer: 12

Bài giải chi tiết:

The perimeter of a square is 64cm. How long is each side? Answer: 16

Bài giải chi tiết:

The product of 3 numbers is 72. If two of the numbres are 2 and 3. What is the third number? Answer: 12

Bài giải chi tiết:

The smallest 5 - digit odd number that can be formed using all the digits 5; 0; 1; 9 and 3 is… Answer: 10359

There are 3 times as many children as adults at a garden party. There are 240 children. How many people are there at the party? Answer: 320

Bài giải chi tiết:

What is the number for 40 thousands 5 tens 8 ones? Answer: 40058

What is the value of 8 in 289 763? Answer: 80000

When a pail is half filled with water, its weight is 2kg500g the pail when empty weighs only 1kg. What is the weight of the pail when it is completely filled with water? Answer: 4

Bài giải chi tiết:

Which number’s underlined digit is worth 60? Answer: 8563


Which of the following is not divisible by 7? Answer: 74


Which of following numbers is the greatest? Answer: 4732


Write >; =; < in the following blank. 17 - 2 + 4 … 6 x 3 + 1. Answer: =


Exam 3: Sắp xếp


Sắp xếp theo thứ tự bên dưới (từ trái qua phải, từ trên xuống dưới):

658	692	724	896
989	998	5044	5155
5171	12903	12905	34671
34672	45209	46211	56213
56214	56289	65980	65982
65988	123201	123203	123205
123277	145561	145562	145879
340000	340235

Các bạn có thể tải toàn bộ: Đề và đáp án vòng 3 thi Toán tiếng Anh (Math ViOlympic) lớp 4 năm học 2016 - 2017 tại đây.

Exam 1: Vượt chướng ngại vật

4 is just after of 3 and 3 is just before of 4. What is the product of just after and just before of 8? Answer: 63

Giải:

At the bus stop, 7 passengers alighted from a bus and 17 passengers boarded it. There were 42 passengers on the bus after that. How many passengers were there on the bus at first? Answer: 32

Giải:

Compare: A = 10 + 32 + 54 + 76 + 98 and B = 54 + 90 + 36 + 12 + 78. Answer: =


Fill in the given sequences with the next consecutive natural number: 2; 4; 6; … Answer: 8

Fill in the given sequences with the next consecutive natural number: 3; 5; 7; … Answer: 9

Fill in the given sequences with the next consecutive natural number: 909; 910; 911; … Answer: 912

Find the value of the following expression: 6000 - 1300 x 2. Answer: 3400

Find the value of the following expression: 9000 + 1000 : 2. Answer: 9500

Find the value of y if: y x 2 = 4826. Answer: 2413

Find the value of y if: y : 3 = 1532. Answer: 4596

Find the value of y if: y - 725 = 8259. Answer: 8984

Find the value of y if: y + 875 = 9936. Answer: 9061

How many 2 - digit even numbers are there? Answer: 45

Giải:

How many even numbers between 1 and 20 are there? Answer: 9

Giải:

If x + (3 + 4 + 5) = 19 then x = ... Answer: 7

Giải:

If (y + 1) + (y + 2) + (y + 3) + … + (y + 9)= 90 then y = ... Answer: 5

Giải:

In a school, there are 840 boys. There are triple as many girls as boys. Find the total people of the school? Answer: 3360

Giải:

Jean paid $8 for each of her 58 books and had $120 left. How much did she have at first? Answer: 584

Giải:

Jean’s weekly salary is $30. She spends $21 and saves the remainder every week. How may weeks will she take to save $90? Answer: 10

Giải:

John spent $3146. Lisa spent $1069 more than John. How much did they spend altogether? Answer: 7361

Giải:

The differnce of the least 5 - digit number and the greatest 4 - digit number is ... Answer: 1

Giải:

The next number in the sequence 3; 6; 9; 12; 15; 18; … is ... Answer: 21

Giải:

There are 58 cartons of canned drinks. In each carton, there are 9 canned drinks. How many canned drinks are there altogether? Answer: 522

Giải:

Two thousand and five is written as... Answer: 2005

What is the missing number in the blank? 496 x 7 = … + 450. Answer: 3022

What is the place value of digit 5 in this number 45? Answer: 5

What is the place value of digit 5 in this number 456? Answer: 50

What is the place value of digit 5 in this number 12589? Answer: 500

What is the place value of digit 5 in this number 195300? Answer: 5000

Which of the following numbers can be the addition of four consecutive numbers: 29; 18; 11; 15? Answer: 18

Giải:

Exam 2: Điền kết quả thích hợp vào chỗ (...)

Fill in the blank with the suitable sign (>; =;<)

Câu 1:
Compare: 100 x 5 + 10 x 4 + 6 < 554

Fill in the blank with the suitable number

Câu 7:
1kg of apple costs 2 dollar and 1kg of orange costs 3 dollar more than an apple. Jean bought 10kg of apples and 8kg of oranges. How much did she have to pay for the fruits?
Answer: 60 dollar.

Giải:

Câu 7:
6 is just after of 5 and 5 is just before of 6. What is the product of just after and just before of 10?
Answer: 99

Giải:

Câu 9:
248 boys and 418 girls were divided into groups of 9. How many groups were there altogether?
Answer: 74 groups.

Giải:

Câu 9:
A number has a digit 3 in ones place. It is greater than 64 but less than 82. What number is it?
Answer: 73

Giải:

Câu 9:
Ali bought 7 computers at 218 dollar each. How much did he spend altogether?
Answer: He spent 1526 dollar.

Giải:

Câu 7:
Anna has 206 stickers and Mary has 78 stickers. How many stickers must Anna give to Mary so that they have the same number of stickers?
Answer: 64 stickers.

Giải:

Câu 4:
Fill in the sequence with the missing number in order to have 3 consecutive natural numbers.
86; 87; 88

Câu 2:
Fill in the sequence with the missing number in order to have 3 consecutive natural numbers.
99; 100; 101

Câu 3:
Fill in the sequence with the missing number in order to have 3 consecutive natural numbers.
897; 898; 899

Câu 4:
Find the number a, 0 is the units digit and 68 < a <74.
Answer: a = 70.

Giải:

Câu 6:
Find the product of 7 tens and 7 ones.
Answer: 490

Giải:

Câu 2:
How many double digit numbers are there?
Answer: 90 numbers.

Giải:

Câu 10:
If A is divided by 9 then the sum of the quotient and 9 is the greatest 2-digit number. Find the value of A.
Answer: A = 810

Giải:

Câu 6:
Jean has 3014 beads. She has 497 beads less than Gillian. How many beads do they have altogether?
Answer: They have 6525 beads altogether.

Giải:

Câu 10:
Mark earns 70 dollar in 2 hours. He will earn 175 dollar in 5 hours.

Giải:

Câu 10:
Mr Junior bought 1 magazine, 1 book and 1 pen. The pen costs 5 dollar, the book costs 31 dollar more than the pen. The magazine costs twice as much as the book. How much did he spend on the three things?
Answer: He spent 113 dollar.

Giải:

Câu 5:
The perimeter of a square garden is 36m. What is its area?
Answer: Its area is 81 m².

Giải:

Câu 10:
The product of 40 and a number m, is a 2-digit number that greater than 40. The value of m is 2

Giải:

Câu 6:
There are 56 apples in a basket. 1/4 of them are green and the rest are red. How many red apples are there?
Answer: There are 42 red apples.

Giải:

Câu 7:
What is the smallest even number such that it is the product of 9 and a number?
Answer: 0

Giải:

Câu 8:
What is the smallest number you can make by using all of the following digits? 8; 0; 2
Answer: 208

Câu 2:
Write the words in number form which consist of: 6 hundred thousands, 3 ten thousands, 4 thousands and 2 units.
Answer: 634002

Câu 8:
Write the words in number form which consist of: 7 hundred thousands, 6 thousands, 3 hundreds, 4 tens and 2 units.
Answer: 706342

Câu 3:
Write the words in number form which consist of: 7 ten thousands, 6 thousands, 3 hundreds, 4 tens and 2 units.
Answer: 76342

Exam 3: Đi tìm kho báu

9 x 9 = □ x 9 + 9 + 9 + 9 + 9. The missing number in the box is… Answer: 5


10 thousands, 15 hundreds, 2 tens is the same as... Answer: 11520

A number when divided by 6 gives a quotient 347. Find the number. Answer: 2082

Giải:

A square has an area of 81 cm². Find the perimeter of the square. Answer: 36

Giải:

Adding 29 to the greatest 2 - digit number then dividing the sum by 4, we get… Answer: 32

Giải:

Emily is 1 year younger than Anna. Barbara is 9 years old. Madison is 3 years older than Barbara and 2 years older than Anna. How old is Emily? Answer: 9

Giải:

Fill in the blank: Number “one hundred thousand” is written as... Answer: 100000

Fill in the blank: Number “seventy thousand” is written as... Answer: 70000

Fill in the blank: Number “two hundred eighty thousand” is written as… Answer: 280000

Fill in the blank with the previous consecutive natural number. …; 1. Answer: 0

Fill in the blank with the previous consecutive natural number: …; 105. Answer: 104

Fill the suitable digit in the blank: 471… < 4711. Answer: 0

Fill the suitable digit in the blank: 25367 > …5367. Answer: 1

Fill the suitable digit in the blank: 6…524 > 68524. Answer: 9

Fill the suitable digit in the blank: 282828 < 28282... Answer: 9

Find a number that contains 4 ten thousands, 3 hundreds, 2 tens and 1 ones. Answer: 40321

Find the natural number y if the units digit is 0 and 38 < y < 48. Answer: 40

Giải:

Find y such that y : 6 = 14 x 2. Answer: 168

John bought 2 books, 3 erasers and 4 pencils for $87. The cost of 1 book and 2 pencils was $21. What was the cost of one eraser? Answer: 15

Giải:

Mary has a total 280 eggs. Using these eggs she will fill empty cartons that each carton holds 8 eggs. How many cartons are needed to hold all of eggs? Answer: 35

Giải:

Mrs Hoa had 2kg of sugar. She used ¼ of that to make a cake. How many grams of sugar does she have left? Answer: 1500

Giải:

One case can hold 4 boxes, each box can hold 4 binders. How many cases are needed to hold 256 binders? Answer: 16

Giải:

There area of the figure is m². Answer: 88

Giải:

There is a row of chairs. Tim sits on one of the chairs. There are 7 chairs on his left and 9 chairs on his right. How many chairs are there altoghether? Answer: 17

Giải:

Using the digits 3, 5, 8, 6 and 4 to form the greatest distinct 5 - digit even number. Answer: 86534

Giải:

Using all three digits 6; 1; 3 to write a number which is smaller than 140. Answer: 136

Giải:

Bài 1 Vòng 3, có một bài dù đã đọc đi, đọc lại nhiều lần nhưng mình vẫn không hiểu ý người ra đề muốn gì. Rất mong các bạn giúp mình giải bài này.

Cám ơn bạn đã trợ giúp. Xin phép bạn cho mình cập nhật bài này vào trong file cho phép mọi người tải về sử dụng nhé.

Các bạn có thể tải toàn bộ: Đề và đáp án vòng 4 thi Toán tiếng Anh (Math ViOlympic) lớp 4 năm học 2016 - 2017 tại đây.

Bài thi số 1: Sắp xếp


Sắp xếp theo bảng bên dưới (từ trái qua phải, từ trên xuống dưới):


Bài thi số 2: Đi tìm kho báu

8 liters of oil is filled in the fisrt can; 6 liters of oil is filled in the second can. How many liters are there in each can if they are filled equally? Answer: 7

Giải:

Convert: 1/5 century = … years. Answer: 20

Convert: 1/4 day = … hours. Answer: 6

Convert: 1/3 day = … hours. Answer: 8

Convert: 1/2 century = … years. Answer: 50

Convert: 1/2 day = … hours. Answer: 12

Convert: 2 hours = …minutes. Answer: 120

Convert: 2kg = …g. Answer: 2000

Convert: 5kg = …g. Answer: 5000

How many 2 - digit numbers can you make by using 1; 0; 3; 4? Answer: 12

Giải:

How many 2 - digit numbers can you make by using 1; 2; 3 and 4? Answer: 16

Giải:

How many 3 - digit numbers can you make by using 1; 2; and 3? Answer: 27

Giải:

Find the arithmetic mean of consecutive numbers from 1 to 7. Answer: 4

Giải:

Find the arithmetic mean of consecutive numbers from 1 to 15. Answer: 8

Giải:

Find the arithmetic mean of consecutive numbers from 1 to 99. Answer: 50

Giải:

Find the arithmetic mean of consecutive numbers from 3 to 11. Answer: 7

Giải:

Find the arithmetic mean of consecutive numbers from 5 to 17. Answer: 11

Giải:

How many years are there in 4 centuries? Answer: 400

Giải:

If A; B and C are odd numbers such that A < B < C and A + B + C = 23 then the possible greatest value of C is… Answer: 19

Giải:

If a = 10; b = 12 and the average of a, b, c is 17 then c = … Answer: 29

Giải:

If the average of m and 9 is 14. Then m = ... Answer: 19

Giải:

If the average of three distinct numbers is 18 then the possible greatest value for one of these numbers is ... Answer: 53

Giải:

If the average of y; y + 2 and y + 4 is 12. Then y = ... Answer: 10

Giải:

The average of 51; 64 and y is 124. Then y = ... Answer: 257

Giải:

The average of the natural numbers from 9 to 21 is... Answer: 15

Giải:

There are 8 packs of cookies, each of them weighs 150g. There are also 4 packs of candies, each of them weighs 200g. How many kilograms of cookies and candies are there altogether? Answer: 2

Giải:

There are 28, 27, 32 and 37 students in 4 classses 4A, 4B, 4C and 4D respectively. What is the average number of students in each class? Answer: 31

Giải:

Write down the greatest even 3 - digit number. Answer: 998

Write down the greatest odd 3 - digit number. Answer: 999

Bài thi số 3: Vượt chướng ngại vật

56 + 87 = 87 + … The missing number is ... Answer: 56

98 + 72 = 72 + … The missing number is ... Answer: 98

A fish weighs 1kg700g, a bundle of vegetable weighs 300g. How many kilograms do they weigh in total? Answer: 2

Giải:

Every 2 jackets cost $30 and every 4 coats cost $40. Find the total cost of 8 such jackets and 16 such coats? Answer: 280

Giải:

Find the value of a such that: 115 x 99 = 110 x 99 + 10 x 99 - a x 99. Answer: 5

Giải:

Find the value of x such that: x - 3925 = 1527. Answer: 5452

Giải:

Find the value of x such that: x - 3925 = 1559. Answer: 5484

Giải:

Find the value of y, if 58 < y < 62 and y is an even number. Answer: 60

Jenny, Mary and Anna have a total 390 stamps. Jenny has 39 stamps more than Anna and Anna has 45 stamps more than Mary. How stamps does Jenny have? Answer: 171

Giải:

If a + b = 279, a < b and there are 13 odd numbers between a and b. Then the value of a is ... Answer: 126

Giải:

In this figure, MNPQ is a square. Each its side is 15cm long. MGHQ is a rectangle and its width is 12cm shorter than its length. The perimeter of the rectangle GNPH is ...cm. Answer: 54

Giải:

The 20th century starts in 1901. It ends in … Answer: 2000

The 21st century starts in 2001. It ends in … Answer: 2100

The average of all 3 - digit even numbers is ... Answer: 549

Giải:

The average of all 4 - digit even numbers is ... Answer: 5499

Giải:

The average of all numbers that are smaller than 1000 is ... Answer: 499

Giải:

The average of five consecutive numbers is 105. Find the greatest number? Answer: 107

Giải:

The average of five numbers is 20. The average of the five numbers is 16 when one of the numbers is changed to 4. What is the original value of the changed number? Answer: 24

Giải:

The average of four numbers is 25. The average of the four numbers is 23 when one of the numbers is changed to 6. What is the original value of the changed number? Answer: 14

Giải:

The average of six numbers is 10. The average of the six numbers is 8 when one of the numbers is changed to 3. What is the original value of the changed number? Answer: 15

Giải:

The difference of 10999 and the least 3 - digit number is … Answer: 10899

Giải:

The difference of 10999 and the least 4 - digit number is … Answer: 9999

Giải:

The greatest 3 - digit number is ... Answer: 999

The greatest 4 - digit number is … Answer: 9999

The last digit of the product 2 x 4 x 6 x … x 78 is ... Answer: 0

Giải:

The last digit of the product 3 x 5 x 7 x 9 x 11 is ... Answer: 5

Giải:

The figure below is made up of 4 squares its perimeter is 40cm. What is the area of one square? Answer: 16

Giải:

Các bạn có thể tải toàn bộ: Đề và đáp án vòng 5 thi Toán tiếng Anh (Math ViOlympic) lớp 4 năm học 2016 - 2017 tại đây.

Bài thi số 1: Tìm cặp bằng nhau

3182 = 4936 - 1754	3189 = 1360 + 1829
3303 = 1745 + 1558	3312 = 5136 - 1824
3327 = 1824 + 1503	3354 = 5136 - 1782
5398 = The value of x such that x + 2341 = 7739	5452 = The value of x such that x - 3925 = 1527
5656 = 22624 : 4	5690 = 7472 - 1782
5691 = 2726 + 2965	5718 = 7472 - 1754
5925 + 6378 = 5925 + 6378	6316 = 4562 + 1754
6318 = 3159 x 2	6490 = 9352 - 2862
6492 = 2164 x 3	6959 = 20877 : 3
6960 = 1824 + 5136	9200 = 1840 x 5
9254 = 7472 + 1782	9630 = 5978 + 3652
10000 = The difference of 10999 and the greatest 3 - digit number	10107 = The value of y such that y - 2314 = 7793
10134 = The value of y such that y - 7793 = 2341	12114 = 9352 + 2762
12119 = 2762 + 9357	12788 = 4936 + 7852
17288 = 7836 + 9452	99999 = The greatest 5 - digit number

Bài thi số 2: Điền kết quả thích hợp vào chỗ (...)

Câu 10:
A fruit seller had 150 apples and 90 pears for sale. After selling some of them, he had 32 apples and 29 pears left. How many more apples than pears did he sell?
Answer: He sold 57 more apples than pears.

Giải:

Câu 9:
An MTR train left Kovan Station with 259 male and 678 female passengers. At Hougang Station, 588 passengers alighted and only 30 female passengers boarded the train. How many passengers were there in the train then?
Answer: 379 passengers.

Giải:

Câu 9:
Anna spent 472 dollars on food, 89 dollars on bus fares and saved 302 dollars. Tom had the same amount of money as Anna but he saved 38 more dollars than Anna. How much did he spend in all?
Answer: He spent 523 dollars.

Giải:

Câu 3:
Calculate: 3512 + 4231 = 7743

Câu 4:
Calculate: 4712 + 2131 = 6843

Câu 7:
Find the difference between 10 thousands and 736 tens.
Answer: The difference is 2640

Giải:

Câu 8:
Find the sum of all even numbers in the list below:
342, 449, 230, 1887, 408, 7360, 1755
Answer: The sum is 8340

Giải:

Câu 2:
Four numbers: 7922, 3896, 7897, 3893 are on a board. What is the difference between the largest odd number and the smallest even number?
Answer: The difference is 4001

Giải:

Câu 9:
Given 4 digits: 4, 6, 2, 0.
What is the difference of the largest and the smallest 4-digit numbers that can be formed from these digits. Use each digit only ones.
Answer: The difference is 4374

Giải:

Câu 10:
How many 2-digit numbers are there from 11 to 27?
Answer: There are 17 numbers.

Giải:

Câu 6:
How many hundreds are there in the sum of 3589, 1895, 388 and 3003?
Answer: 88

Giải:

Câu 3:
How many hundreds are there in 2016?
Answer: 20

Giải:

Câu 5:
I add 356 to a number. The result is twice the difference of 4252 and 169. What is the number?
Answer: The number is 7810

Giải:

Câu 4:
If 1893 - m = 1257, then m = 636

Câu 1:
If 3241 - m = 187, then m = 3054

Câu 9:
In a 4-digit number, the ones digit is the possible largest number, the hundreds digit is the smallest odd number and the tens digit is 1 more than the hundreds digit. The thousands digit is the sum of the hundreds and the tens digit. Find the number.
Answer: The number is 3129

Giải:

Câu 5:
Joanne is 28 years older than Melvin. Mabel is 16 years younger than Joanne. If Mabel is 43 years old, find the total age of them.
Answer: 133 years old.

Giải:

Câu 10:
Kenny had 863 dollars. He spent 472 dollars on food, 89 dollars on bus fares and saved the rest. Valeie had the same amount of money as Kenny but she saved 38 more dollars than Kenny. How much did she save?
Answer: She saved 340 dollars.

Giải:

Câu 9:
Mark has 68 more books than Michael. Tom has 21 fewer books than Mark. They have 865 books in all. How many books does Mark have?
Answer: Mark has 318 books.

Giải:

Câu 9:
Mr Tan is 35 years older than his son and Mrs Tan is 8 years younger than Mr Tan. 10 years ago, his son was 17 years old. Find the total age of them now.
Answer: 143 years old

Giải:

Câu 6:
Subtract 85 from the sum of 2348 and 788. How many tens are there in the result?
Answer: 305

Giải:

Câu 10:
The average of two numbers is 234 and the smaller number is 106. What is the larger number?
Answer: The larger number is 362

Giải:

Câu 2:
The value of 6132 + 1584 is 7716

Câu 2:
The value of 7142 + 2284 is 9426

Câu 6:
There are 1200 animals. 125 of them are cats, 89 of them are dogs and the rest are goats. How many more goats than cats are there?
Answer: There are 861 more goats than cats.

Giải:

Câu 8:
There are 1230 bottles in a factory. 289 of them are red. There are 259 more blue bottles than red bottles. The rest are purple bottles. How many purple bottles are there in the factory?
Answer: There are 393 purple bottles.

Giải:

Câu 5:
There are three numbers. The first number is 87 less than the second number. The third number is 28 more than the second number. The second number is 300. Find the sum of the first number and the third number.
Answer: The sum is 541

Giải:

Câu 4:
What is the missing number?
2734 + ... = 5360
Answer: 2626

Câu 4:
What is the missing number?
2734 + ... = 8375
Answer: 5641

Câu 8:
What is your answer if you add 32 tens and 18 ones to the difference of 5000 and 32 hundreds?
Answer: Your answer is 2138

Giải:

Bài thi số 3: Đi tìm kho báu

A table and a bed cost $1350. A vacuum cleaner and a bed cost $1228. If the table costs $450, find the cost of the vacuum cleaner. Answer: 328

Giải:

How many rectangles are there in the figure? Answer: 6

Giải:

How many rectangles are there in the figure? Answer: 10

Giải:

Find X such that X = 21 - 20 + 19 - 18 + 17 - 16 + … + 1. Answer: 11

Giải:

Find X such that X = 31 - 30 + 29 - 28 + 27 - 26 + … + 1. Answer: 16

Giải:

Find y such that (y + 1) + (y + 2) + (y + 3) = 12. Answer: 2

Giải:

Find Y such that Y = 11 - 10 + 9 - 8 + 7 - 6 + … + 1. Answer: 6

Giải:

Giải:

Giải:

Subtract: 7000 - 4325 = … Answer: 2675

Subtract: 7500 - 3421 = … Answer: 4079

Subtract: 7890 - 4329 = … Answer: 3561

The average of m and the greatest 3 - digit number is 765. The value of m is... Answer: 530

Giải:

The average of m and the smallest 4 - digit number is 765. The value of m is... Answer: 530

Giải:

The cost of 3 pencils is 9 dollars. How much does Mrs Loan have to pay for 1 pencil? Answer: 3

Giải:

The cost of 4 pens is 8 dollars. How much does Mrs Loan have to pay for 1 pen? Answer: 2

Giải:

The difference of 4284 and 2347 is the same as the sum of 1715 and Y. The value of Y is … Answer: 222

Giải:

The difference of 4283 and 2347 is the same as the sum of 1715 and X. The value of X is … Answer: 221

Giải:

The difference of 5674 and 675 is the same as the sum of 2765 and X. The value of X is … Answer: 2234

Giải:

The difference of 5678 and 2132 is the same as the sum of 1212 and Y. The value of Y is … Answer: 2334

Giải:

The greatest distinct 2 - digit number is … Answer: 98

The number that is 4499 less than 80 hundreds is … Answer: 3501

Giải:

The sum of 212 and 345 is … Answer: 557

Giải:

The sum of 3456 and 987 is … Answer: 4443

Giải:

The value of y if 546 - y = … Answer: 446

The value of y if y - 245 = 100 is … Answer: 345

What must be added to 3971 to make 8000? Answer: 4029

Giải:

What must be added to 5431 to make 8768? Answer: 3337

Giải:

Using all of the following digits: 5; 8; 0; 3 form the smallest odd 4 - digit number and the greatest even 4 - digit number and find their difference. Answer: 5445

Giải:

Các bạn có thể tải toàn bộ: Đề và đáp án vòng 6 thi Toán tiếng Anh (Math ViOlympic) lớp 4 năm học 2016 - 2017 tại đây.

Bài thi số 1: Sắp xếp


Sắp xếp theo bảng bên dưới (từ trái qua phải, từ trên xuống dưới):


Bài thi số 2: Điền kết quả thích hợp vào chỗ (...)

Fill in the blank with the suitable number
Câu 1:
A fund received 75500000 VND on the first day, 85950000 VND on the second day and 14500000 VND on the third day. How much money did the fund receive altogether?
Answer: The fund received 175950000 VND altogether.

Giải:

Câu 10:
Eight similar pens and 3 similar books cost 324 dollars. If each book costs 36 dollars then one pen costs 27 dollars.

Giải:

Câu 2:
Fill in the blank with the correct number.
(a + 28) + 2 = a + (28 + 2)

Câu 3:
Fill in the blank with the correct number.
(a + 42) + 9 = a + (9 + 42)

Câu 3:
Find the value of y such that 768 - y = 545.
Answer: y = 223

Câu 1:
Find the value of y such that y - 305 = 545.
Answer: y = 850

Câu 9:
If A + B + C = 17 and A + B - C = 7 then the average of A and B is 6

Giải:

Câu 10:
If A + B + C = 43 and A + B - C = 17 then the average of A and B is 15

Giải:

Câu 9:
If A - B = 8 and the average of A and B is 7 then A = 11

Giải:

Câu 10:
If A - B = 16 and the average of A and B is 12 then B = 4

Giải:

Câu 9:
If the product of 15 and 12 is divided by 3 then the result is  60

Giải:

Câu 9:
If the product of 15 and 12 is divided by 6 then the result is 30

Giải:

Câu 5:
In a café, there were 267 adults and 123 teenagers. If each of them spent 8 dollars then they spent 3120 dollars in all.

Giải:

Câu 8:
Joyce saved 360 more dollars than Bobby. Carl saved 325 more dollars than Joyce. If Bobby saved 579 dollars, Carl would have saved 1264 dollars.

Giải:

Câu 9:
Mary wanted to buy a washing machine for 651 dollars. She was short of 239 dollars. She had 412 dollars.

Giải:

Câu 8:
Mr Tan bought 8 pens at 89 dollars each and spent 367 dollars on clothes. He spent 1079 dollars in all.

Giải:

Câu 10:
On a Christmas tree, there are 45 glass stars and 26 golden balls. Each glass star costs 4 dollars while a golden ball costs 3 more dollars than a glass star. What is the total cost of the glass stars and golden balls?
Answer: The total cost is 362 dollars.

Giải:

Câu 7:
The perimeter of a rectangle is 32cm. The length is 4cm longer than the width. What is its area?
Answer: Its area is 60 cm².

Giải:

Câu 7:
The semiperimeter of a rectangle is 12cm. The length is 4cm longer than the width. What is its area?
(the semiperimeter of a rectangle is half its perimeter)
Answer: Its area is 32 cm².

Giải:

Câu 8:
The semiperimeter of a rectangle is 18cm. The length is 4cm longer than the width. What is its area?
(the semiperimeter of a rectangle is half its perimeter)
Answer: Its area is 77 cm².

Giải:

Câu 4:
The sides of a triangle are a, b and c respectively.

What is the perimeter of the triangle if a = 5cm, b = 4cm, and c = 3cm?
Answer: The perimeter of the triangle is 12 cm.

Giải:

Câu 4:
The sides of a triangle are a, b and c respectively.

What is the perimeter of the triangle if a = 8cm, b = 6cm, c = 6cm?
Answer: The perimeter of the triangle is 20 cm.

Giải:

Câu 2:
The sides of a triangle are a, b and c respectively.

What is the perimeter of the triangle if a = 10cm, b = 11cm, c = 12cm?
Answer: The perimeter of the triangle is 33 cm.

Giải:

Câu 7:
The sum of the ages of the father and his son is 58. The father is 38 years older than his son. How old is the father?
Answer: The father is 48 years old.

Giải:

Câu 7:
The sum of the ages of the mother and her son is 60. The mother is 38 years older than her son. How old is the mother?
Answer: The mother is 49 years old.

Giải:

Câu 6:
There are 28 students in a class. The number of boys is 4 more than the number of girls. How many girls are there in the class?
Answer: There are 12 girls in the class.

Giải:

Câu 6:
There are 42 students in a class. The number of boys is 6 more than the number of girls. How many boys are there in the class?
Answer: There are 24 boys in the class.

Giải:

Câu 9:
There were 10 cartons of eggs. Each carton contained 200 eggs. Mr Tom sold 1320 eggs and put the remaining eggs equally into trays of 8. How many trays did he need?
Answer: He needed 85 trays.

Giải:

Câu 4:
There were 5256 people in a commune. After a year, the population increased by 79. One year later, it increased further by 71. How many people are there in total after 2 years?
Answer: 5406 people.

Giải:

Câu 3:
There were 5256 people in a commune. After a year, the population increased by 79. One year later, it increased further by 71. How many people did the population of the commune increase by after 2 years?
Answer: 150 people.

Giải:

Bài thi số 3: Đi tìm kho báu

12 x (27 - 18) = 12 x 27 - 12 x … The missing number is … Answer: 18

15 x (25 - 13) = 15 x 25 - 15 x … The missing number is … Answer: 13

A postman travels 138km everyday. A salesman travels 240km more than a postman in 6 days. If the salesman travels the same distance everyday, how far will he travel in 10 days? Answer: 1780

Giải:

A table costs $235 more than a chair. If 4 chairs and a table cost $515, what is the cost of each chair? Answer: 56

Giải:

A table costs $235 more than a chair. If 4 chairs and a table cost $515, what is the cost of the table? Answer: 291

Giải:

Anna is 9 years older than Jimmy. 2 years ago, Anna was 45 years old. Find their present total age? Answer: 85

Giải:

Class 4A and 4B plant 600 trees altogether. 4A plants 50 more trees than 4B. How many trees does each of the two classes plant? Answer: 325 and 275

Giải:

Class 4A and 4B plant 800 trees altogether. 4A plants 70 more trees than 4B. How many trees does each of the two classes plant? Answer: 435 and 365

Giải:

Find the value of y such that y : (1 + 200) = 4. Answer: 804

Find the value of y such that y : (1 + 200) = 6. Answer: 1206

Jacob needs 9 erasers. Each of them costs 12 cents. How much change will he get back from 200 cents? Answer: 92

Giải:

Jacob needs 15 erasers. Each of them costs 8 cents. How much change will he get back from 150 cents? Answer: 30

Giải:

Mary has 3 packs of candies. There are 11 candies in each pack. Mary has ... candies in all. Answer: 33

Melvin bought 6kg of grapes and 5 loaves of bread at $2 each. He paid by a hundred dollars cheque and received $60 change. How much did 1kg of grapes cost? Answer: 5

Giải:

Mr and Mrs Tan, with their 4 children and 8 relatives, want to go to the zoo. A taxi carry 4 passengers. How many taxis do they need to hire? Answer: 4

Giải:

Mr and Mrs Tan, with her 6 children and 9 relatives, want to go to the zoo. A taxi carry 4 passengers. How many taxis do they need to hire? Answer: 5

Giải:

Nick spends 34 dollars to buy 3 erasers and 7 pens. If 2 pens cost 8 dollars then 1 eraser costs … dollars. Answer: 2

Giải:

The sum of the ages of two siblings is 26. The younger sister is 6 years younger than the older sister. How old is the younger sister? Answer: 10

Giải:

The sum of the ages of two siblings is 36. The younger sister is 8 years younger than the older sister. How old is the younger sister? Answer: 14

Giải:

The sum of two numbers is 372 and their difference is 102. The smaller number is … Answer: 135

Giải:

Tom bought 5kg of grapes and 10 loaves of bread at $2 each. He paid by a hundred dollars cheque and received $60 change. How much did 1kg of grapes cost? Answer: 4

Giải:

Tom spends 68 dollars to buy 12 erasers and 14 pens. If 2 pens cost 8 dollras then 1 eraser costs $... Answer: 1

Giải:

Tony is 12 years older than Jimmy. 5 years ago, Tony was 45 years old. Find their present total age. Answer: 88

Giải:

Two factories produce 1200 products. The first factory produces 120 less products than the second factory. How many products does each of them produce? Answer: 540 and 660

Giải:

What is the value of the expression below? 468 : 6 + 61 x 2. Answer: 200

What is the value of the expression below? 570 - 225 - 167 + 67. Answer: 245

What is the value of the expression below? 5625 - 5000 : (726 : 6 - 113). Answer: 5000

When Kenny bought 4 similar pens, he had $8 left. When he bought 7 such pens, he was short of $22. How much did each pen cost? Answer: 10

Giải:

sua đã viết:Thầy thaodo đáp án Câu này không hợp lý:
When Kenny bought 4 similar pens, he had $8 left. When he bought 7 such pens, he was short of $22. How much did each pen cost? Answer: 10.
Vì đầu bài không có giả thiết số tiền ban đầu như nhau, thế mà thầy lại cho rằng: 4 x a + 8 = 7 x a - 22.
Mong thầy giảng lại bài này!?
My email: nguyenhoangha2@gmail.com
Cảm ơn thầy!

Đề bài: "When Kenny bought 4 similar pens, he had $8 left. When he bought 7 such pens, he was short of $22. How much did each pen cost?" được tạm dịch như sau: "Khi Kenny mua 4 cây viết thì anh ấy còn dư lại 8 USD. Khi anh ấy mua 7 cây viết cùng loại thì bị thiếu 22 USD. Hãy cho biết giá tiền một cây viết là bao nhiêu?"

Mặc dù đề bài không nói Kenny có bao nhiêu tiền nhưng chắc chắn là anh ấy có tiền và số tiền này nếu mua 4 cây viết thì anh ấy còn dư lại 8 USD, nếu mua 7 cây viết cùng loại thì bị thiếu 22 USD. Số tiền của cùng một người, tại cùng một thời điểm thì nó như thế nào thì bạn ... tự suy nghĩ đi nhé.

Nhờ các bạn giúp giải những câu hỏi sau:

Câu 1: In a flower shop, there are 3 differenct colors of roses. The total of the whites and the pinks is 400, the reds and the pinks is 450 and the whites and the reds is 350. There are … pink roses in the shop?

Câu 2: Susan read 265 pages of her storybook on Friday. Ivan read 145 pages of the same storybook and has 287 pages left. If Susan reads 59 pages on Saturday then how many pages must she read to complete the storybook?

Câu 3: Tom added all odd numbers from 1 to 1999. Anna added all even numbers from 2 to 2000. Then Mary subtracted Tom’s result from Anna’s result. Mary’s result is …

Câu 4: Tom writes the consecutive natural numbers from 1 to 11 on a board. If he erasers some of the numbers and adds up the remaining ones then he will get a sum of 40. The number of numbers that is erased on the board at most is …

k43thandd đã viết:Các bác cho em hỏi câu này chút ạ:
8 liters of oil is filled in the fisrt can; 6 liters of oil is filled in the second can. How many liters are there in each can if they are filled equally? Answer: 7

Giải:
Can thứ nhất chứa 8 lít dầu
Can thứ hai chứa 6 lít dầu
Trung bình mỗi can chứa số lít dầu là: (8 + 6) : 2 = 7

Em thì hiểu là yêu cầu bài toán: Khi đổ đầy như nhau ở 2 can thì mỗi can có bao nhiêu Lít dầu và kết quả là 6, vì can thứ 2 chỉ chứa được tối đa 6 lít dầu (Đán án của chương trình cũng là 7), Mong các bác chỉ thêm ạ

Đối với các câu hỏi Toán, bạn phải đặt nó trong bối cảnh chương trình học của các bé. Câu hỏi này là một dạng của trung bình cộng nên nó có thể được hiểu như sau: Can thứ nhất có 8 lít dầu, can thứ hai có 6 lít dầu. Hỏi mỗi can có bao nhiêu lít nếu số dầu của chúng bằng nhau? Đáp án lúc này sẽ là: (8 + 6) : 2 = 7 lít.

Hòa bình đã viết:Nhờ các bạn giúp giải những câu hỏi sau:

Câu 1: In a flower shop, there are 3 differenct colors of roses. The total of the whites and the pinks is 400, the reds and the pinks is 450 and the whites and the reds is 350. There are … pink roses in the shop?

Câu 2: Susan read 265 pages of her storybook on Friday. Ivan read 145 pages of the same storybook and has 287 pages left. If Susan reads 59 pages on Saturday then how many pages must she read to complete the storybook?

Câu 3: Tom added all odd numbers from 1 to 1999. Anna added all even numbers from 2 to 2000. Then Mary subtracted Tom’s result from Anna’s result. Mary’s result is …

Câu 4: Tom writes the consecutive natural numbers from 1 to 11 on a board. If he erasers some of the numbers and adds up the remaining ones then he will get a sum of 40. The number of numbers that is erased on the board at most is …

Câu 1: In a flower shop, there are 3 differenct colors of roses. The total of the whites and the pinks is 400, the reds and the pinks is 450 and the whites and the reds is 350. There are … pink roses in the shop?

Giải:
Theo đề bài cho, ta có: 2 lần tổng của 3 loại hoa là: 400 + 450 + 350 = 1200 (bông)
Suy ra: Tổng của 3 loại hoa là: 1200 : 2 = 600 (bông)
Số hoa màu hồng có là: 600 - 350 = 250 (bông)

Câu 2: Susan read 265 pages of her storybook on Friday. Ivan read 145 pages of the same storybook and has 287 pages left. If Susan reads 59 pages on Saturday then how many pages must she read to complete the storybook?

Giải:
Số trang của quyển truyện là: 145 + 287 = 432 (trang)
Số trang của quyển truyện mà Susan cần phải đọc tiếp là: 432 - 265 - 59 = 108 (trang)

Câu 3: Tom added all odd numbers from 1 to 1999. Anna added all even numbers from 2 to 2000. Then Mary subtracted Tom’s result from Anna’s result. Mary’s result is …

Giải:
Số số hạng của tổng các chữ số lẻ từ 1 đến 1999 là: (1999 - 1) : 2 + 1 = 1000 (số hạng)
Tổng các chữ số lẻ từ 1 đến 1999 là: (1 + 1999) x 1000 : 2 = 1000000
Số số hạng của tổng các chữ số chẵn từ 2 đến 2000 là: (2000 - 2) : 2 + 1 = 1000 (số hạng)
Tổng các chữ số chẵn từ 2 đến 2000 là: (2 + 2000) x 1000 : 2 = 1001000
Kết quả phép trừ của Mary là: 1001000 - 1000000 = 1000

Câu 4: Tom writes the consecutive natural numbers from 1 to 11 on a board. If he erasers some of the numbers and adds up the remaining ones then he will get a sum of 40. The number of numbers that is erased on the board at most is …

Giải:
Ta có: 11 + 10 + 9 + 8 + 2 = 40
Suy ra: Số các số ít nhất được dùng để tạo nên tổng bằng 40 từ các số đã cho là 5 số
Từ 1 đến 11 có số số hạng là: (11 - 1) : 1 + 1 = 11 (số hạng)
Số các số mà Tom có thể xóa đi nhiều nhất để tổng của các số còn lại bằng 40 là: 11 - 5 = 6 (số)

Các bạn có thể tải toàn bộ: Đề và đáp án vòng 7 thi Toán tiếng Anh (Math ViOlympic) lớp 4 năm học 2016 - 2017 tại đây.

Bài thi số 1: Tìm cặp bằng nhau

143 = 13 x 11	246 = 119 + 127
258 = 165 + 93	353 = 23 x11 +100
364 = 24 x 11 + 100	365 = 843 - 478
367 = 215 + 152	378 = 169 + 209
381 = 643 - 262	385 = 35 x 11
389 = 11 x 24 + 125	390 = 11 x 38 - 28
400 = 4 x 25 x 4	402 = 23 x 24 - 150
405 = 47 x 11 - 112	408 = 2040 : 5
412 = 3708 : 9	420 = 20 x 21
423 = 36 x 11 + 27	425 = 17 x 25
435 = 2610 : ( 2 x 3)	440 = 22 x 20
450 = (60 x 15) : 2	455 = 6825 : (3 x 5)
470 = 9400 : (40 : 2)

Bài thi số 2: Vượt chướng ngại vật

9:20 pm. The clock shows the last time Anna saw before she sleeps. She wakes up at 6:15 am. How long did she sleep? Answer: 535

Giải:

Anna uses a multiplication rule to make the number pattern: 4, 12, 36, 108, … if the pattern continues in the same way, what is the seventh number in this pattern? Answer: 2916

Giải:

Calculate: (20 + 16 + 12 + 8 + 4) : (5 + 4 + 3 + 2 + 1) = … Answer: 4

Calculate: 84 x 11 = … Answer: 924


Calculate: 88 x 11 = … Answer: 968

Calculate: 2016 + 2016 x 2 + 2016 x 97 = … Answer: 201600

Giải:

Convert: 300cm² = …dm². Answer: 3


Find x such that: x : 11 = 46. Answer: 506

I am distinct four - digit number. All you four digits add up to 19. I have no zeros in my number. What is the greatest possible number that I am? Answer: 9721

Giải:

I need 15 parts of fruit to make 3 glasses of juice. How many parts of fruit do I need to make 7 glasses of juice? Answer: 35

Giải:

I save $3 everyday. On the seventh day, I always donate $5 to a church. In how many days will I take to save $51? Answer: 22

Giải:

In a flower shop, there are 3 differenct colors of roses. The total of the whites and the pinks is 400, the reds and the pinks is 450 and the whites and the reds is 350. There are … pink roses in the shop? Answer: 250

Giải:

Jacob needs 11 erasers. Each of them costs 18 cents. How much change will he get back from 200 cents? Answer: 2

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Jason bought food for 11 kids for birthday party. Knowing that, 3 cookies and 8 scones will cost $14, 9 cookies and 2 scones will cost $20. How much is one cookies? Answer: 2

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Kelvin bought a radio and a camera. He spent $460 on a radio and the cost of a camera is $248 more than the radio. The amount he had left was $45 more than the amount ha had spent. How much money did he have at fisrt? Answer: 2381

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Mary has 32 packs of candies. There are 11 candies in each pack. Mary has … candies in all. Answer: 352

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One case can hold 4 boxes. Each box can hold 4 books. How many cases are needed to hold 256 books? Answer: 16

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Share 480 dollars equally for you and 7 your friends. Each person gets … dollars. Answer: 60

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Susan read 265 pages of her storybook on Friday. Ivan read 145 pages of the same storybook and has 287 pages left. If Susan reads 59 pages on Saturday then how many pages must she read to complete the storybook? Answer: 108

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The area of the following square is … dm². Answer: 44521

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The average of 322 and 476 is … Answer: 399

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The sum of two numbers is 326 and their differece is 12. What is the smaller number? Answer: 157

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The sum of two numbers is 769 and their differece is 131. What is the greater number? Answer: 450

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Tom added all odd numbers from 1 to 1999. Anna added all even numbers from 2 to 2000. Then Mary subtracted Tom’s result from Anna’s result. Mary’s result is … Answer: 1000

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Tom needs 11 erasers. Each of them costs 15 cents. How much change will he get back from 200 cents? Answer: 35

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Tom writes the consecutive natural numbers from 1 to 11 on a board. If he erasers some of the numbers and adds up the remaining ones then he will get a sum of 40. The number of numbers that is erased on the board at most is … Answer: 6

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Bài thi số 3: Đi tìm kho báu

A pen costs $30. A clock costs $89 more than the pen. Find the cost of 3 such cloocks.

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Calculate: (8 x 23) : 4 = … Answer: 46

Calculate: 50 : (2 x 5) = … Answer: 5

Doris has six times as much money as Tom. If they have $623 altogether, how much does Tom have? Answer: 89

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Each of two students bought 3 notebooks with the total amount of money of 7200 VND? How much is a notebook? Answer: 1200

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Find the missing numbers: 60, 61, 63, 66, …, 75? Answer: 70

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Five similar knives cost $160. Find the cost of 2 knives. Answer: 64

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In the following multiplication problem, 24 x 8 x 9 = 12 x M x 3. What is the value of 7 x M? Answer: 336

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Jane has 78 boxes of 11 marbles each. He gives his friend 535 marbles. How many marbles does he have left? Answer: 323

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Jim plans to fill goods cars of a train with 180 tonnes of goods. How many goods cars are needed if each car can carry 30 tonnes? Answer: 6

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Mark plans to fill goods cars of a train with 180 tonnes of goods. How many goods cars are needed if each car can carry 20 tonnes? Answer: 9

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Six similar knives cost $180. Find the cost of 3 knives. Answer: 90

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Subtract 3459 from 5600, then multiply the result by 9, we get ... Answer: 19269

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The sum of two consecutive even numbers is 914. What is the greater number? Answer: 458

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The sum of two consecutive numbers is 151. What is the smaller number? Answer: 75

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Tom spends $35 on food and triple as much as on transport everyday. After a week, he had $128 left. How much money did he have at the beginning of a week? Answer: 1108

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There are 67 goats and 85 ducks. How many leg are there altogether? Answer: 438

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Chú ý: Một số bài đề gần giống nhau nhưng khác kết quả, rất dễ bị nhầm:

A shop has 5 pieces of fabric, each of which is 30m long. The shop sold 1/5 of the fabric. How many meters of fabric did the shop have left? Answer: 120

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A shop has 5 pieces of fabric, each of which is 30m long. The shop sold 1/5 of the fabric. How many meters of fabric did the shop sell? Answer: 30

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Bala is 44 years old. His wife is 2 years younger than him. How old will his wife be in 12 year’s time? Answer: 54

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Bala is 45 years old. His wife is 8 years younger than him. How old will his wife be in 15 year’s time? Answer: 52

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Eight boys donated $858. 3 of them donated $96 each. How much did the 5 other boys donate altogether? Answer: 570

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Six boys donated $366. 2 of them donated $86 each. How much did the 4 other boys donate altogether? Answer: 194

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Jim plans to fill goods cars of a train with 180 tonnes of goods. How many goods cars are needed if each car can carry 30 tonnes? Answer: 6

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Mark plans to fill goods cars of a train with 180 tonnes of goods. How many goods cars are needed if each car can carry 20 tonnes? Answer: 9

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The average of all even numbers that are smaller than 150 is … Answer: 74

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The average of all odd numbers that are smaller than 100 is … Answer: 50

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The last digit of the product: 1 x 2 x 3 x 4 x 5 x … x 9 is ... Answer: 0

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The last digit of the product: 1 x 3 x 5 x 7 x 9 x … x 111 is ... Answer: 5

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What is the difference between the greatest and the smallest three - digit number in which all digits are distinct? Answer: 885

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What is the difference between the greatest and the smallest four - digit number in which all digits are distinct? Answer: 8853

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*Bài viết có sử dụng lời giải của bạn thanhha.

Khi mới ra thì Bài thi số 2 có tên gọi là "Vượt chướng ngại vật" nhưng hiện nay đã đổi thành "12 con giáp" nên hình minh họa có thể hiện cả hai dạng này.

Trên cơ sở đề thi cấp huyện, tỉnh, quốc gia năm học 2015 - 2016, mình bổ sung thêm lời giải nhằm giúp cho các bé có tài liệu ôn thi, thêm tự tin khi bước vào vòng thi cấp huyện, tỉnh và quốc gia.

Các bạn có thể tải toàn bộ: Đề và đáp án ôn thi vòng huyện Toán tiếng Anh (Math ViOlympic) lớp 4 NH 2016 - 2017 tại đây.

Exam 1: Đỉnh núi trí tuệ

16 biscuit packs weight 4 kilograms. How many grams is the weight of a biscuit packs? Answer: 250

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27 x 29 + 29 x … + 46 x 71 = 4600. The missing number is … Answer: 19

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An even number M is divisible by 5 if the last digit of M is … Answer: 0

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Betty has 25 marbles. Andrew has 7 marbles more than Carl. Carl has 9 marbles less than Betty. How many marbles does Andrew have? Answer: 23

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Calculate: 1350 : 45 = … Answer: 30

Calculate: 3640 : 14 = … Answer: 260

Convert: 4km² = …m². Answer: 4000000


Find the area of the parallelogram below? Answer: 40

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Find the value of b such that the number 73b4 is divisible by 9? Answer: 4

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Find the value of x such that 81420 : x = 345. Answer: 236

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If x/7 = 45/63 then x = … Answer: 5

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Jane buys 22 candies for three children, Anna, Mary and Peter. Anna eats twice as many candies as Mary. Peter eats more candies than Mary but less than Anna. How many candies does Peter eat? Answer: 7

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Katie has 300 cakes. She gives 12 of them to each of five her friends. How many cakes are left over? Answer: 240

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One pack of pencils has fifteen pencils. Four other packs have twenty pencils each. What is the total pencils in these five packs? Answer: 95

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The 14 people at a party are 7 couples. Each man shakes hands with everyone except his own wife. No two women shake hands with each other. What is the total number of handshakes among these 14 peoples? Answer: 63

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The average of 27 and 69 is… Answer: 48

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The number of fractions m/n such that m + n = 2016 is… Answer: 2016

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The pages of a book are consecutively numbered from 1 to N. There are 636 digits are there in this numbering. The value of N is … Answer: 248

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The perimeter of a rectangular garden is 120m. Its length is 40m. Find its with? Answer: 20

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The sum of all 3 - digit numbers that are greater than 156 is... Answer: 487254

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The sum of all natural numbers that are smaller than 500 and divisible by 5 is... Answer: 24750

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The sum of two numbers is 124 and their difference is 36. What is the value of the larger number? Answer: 80

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The weight of green box is four times the weight of red box. Green box is 9kg heavier than red box. The weight of green box is …kg? Answer: 12

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There are … five - digit numbers. Answer: 90000

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Twenty cups of coffee cost $40. Jane has to pay $... for thirty six such cups of coffe? Answer: 72

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Using each of the digits 2, 3, 5 and 6 exactly once, form two 2 - digit number. What is the difference between the largest possible product and the smallest possible product of two such numbers? Answer: 62x53-25x36=2386

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