Các bạn có thể tải toàn bộ Đề và đáp án vòng 1 thi Toán trực tuyến quốc tế (Global ViOlympic) trình độ tiểu học (Primary) năm học 2015 - 2016 tại đây.

Exam number 1: Fill in the blank with the correct number

Question 7:
100 hundreds + 1000 tens = 20000 ones

Bài giải chi tiết:

Question 5:
A set of five different numbers has an average of 12. If the average of four smallest numbers is 10 then the greatest number is 20

Bài giải chi tiết:

Question 2:
Divide 2016×2016 by 2016. The quotient is 2016

Question 1:
Express seventy thousand, four hundred and nine in numerals.
Answer: 70409

Question 5:
If two dozen pencils cost 12 dollars then 4 pencils cost 2 dollars.

2 tá (viết chì = 24 cây) giá 12 dollar
Giá 1 cây viết chì là: 12 : 24 = ½ dollar
2 dollar mua được số viết chì là: 2 x ½ = 4 (cây)

Question 10:
If we write all of the whole numbers from 10 through 99 and cross out any number in which the first or second digit is divisible by 2 (for example, 41 is crossed out as 4 is divisible by 2 and 36 is crossed out as 6 is divisible by 2), how many numbers are crossed out?
Answer: 65 numbers.

Bài giải chi tiết:

Question 10:
It takes Bella three hours to clean a house. It takes Anna two hours to clean the house. How long would it take for them to clean it together?
Answer: 72 minutes.

Bài giải chi tiết:

Question 6:
Jack, Mary and Jacob buy ice creams. Jack buys twice as many as Mary. Jacob buys three times as many as Jack. If Jacob buys 12 ice creams then Mary buys 2 ice creams.

Question 8:
My giant flower doubles its size every day. On Friday, it is 32 times as big as its was on the preceding Sunday.

Bài giải chi tiết:

Question 9:
Peter and John played in fifteen rounds game. In each round, the winner scored 5 points and the loser scored 2 points. At the end of the game, John’s total score was 57 points. How many rounds did Peter win?
Answer: 6 rounds.

Bài giải chi tiết:

Question 3:
Study the pattern.
88:8=11  
880:8=110
8800:8= ?
The missing number is 1100

Question 4:
Subtract 346 from 752.
Answer: 406

Question 7:
The product of 2 different natural numbers is 9. Their sum is 10

Bài giải chi tiết:

Question 6:
The ratio of boys to girls at a school is 5:4. If there are 255 boys at the school then how many students are there at the school?
Answer: 459 students.

Bài giải chi tiết:

Question 1:
What is 1/6 of 744?
Answer: 124

Exam number 2: Chọn cặp bằng nhau


Exam number 3: Talented Golden Toad

Add 29 to the greatest two - digit number then dividing the sum by 4 we get … Answer: 32

Anna draws bows: a yellow one, then a blue, then a red, then a black, then a yellow, a ble, a red, a black, and so on … What colour is the 2016th bow?  

Bob has   of a pizza. He eats 1/3 of original pizza at breakfast. What fraction of the original pizza does he have left? Answer: 7/24

How many pairs of parallel lines are there in this figure?


In this figure, MNPQ is a square. Each its side is 13cm long. MGHQ is a rectangle. Its width is 10cm shorter than its length. The perimeter of the rectangle GNPH is …

Jeff, Josh and justin have 4 apples in total. In how many ways can it happen? (It is possible that not each of them has an apple). Answer: 15 ways

My birrthday is one day after Monday. Three days before my birthday was ... Answer: Saturday

The greatest fraction in the following group is … Answer: 5/6

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

The smallest natural number divisible by both 5 and 8 is … Answer: 0

What times is 25 minutes after 6:45? Answer: 7:10

When I look at the alphabet, I see that a letter has four times as many letters after it as before it. The letter is … Answer: U

Which of the following is not equal to 18/4? Answer: (36+1)/(8+1)

Các bạn có thể tải toàn bộ Đề và đáp án vòng 2 thi Toán trực tuyến quốc tế (Global ViOlympic) trình độ tiểu học (Primary) năm học 2015 - 2016 tại đây.

Exam number 1: Intellectual peaks

… minutes = 3/5 hours. The missing number is … Answer: 36

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

Anna had 13 marbles. Her dad gave her 12 more marbles. How many marbles does she have now? Answer: 25

Bella wrote the number from 1 to 111. How many digits did she use? Answer: 225

Five years ago, the sum of ages of John and his twin brother Jack was 28. How old is John now? Answer: 19


I need 12 pieces of fruit to make 3 glasses of fruice. How many pieces of fruit do I need to make 7 glasses of fruice? Answer: 28

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

Jack went fishing and caught 9 fish. He kept 5 of the fish in a fishbowl. How many fish did he throw back into the lake? Answer: 4

Jane is 15 years old. She is twice as old as Mary was when Jane was as old as Mary is now. How old is Mary now? Answer: 10

Jason was buying treats for 11 kids for his birthday party. He was told that 3 cookies and 8 scones will cost $14, but 9 cookies and 2 scones will cost $20. How much is one cookie? Answer: 2

Mary has a total of 280 eggs. Using these eggs, she will fill empty cartons that each hold 12 eggs. The greatest number of egg cartons that she can fill completely is … Answer: 23

Mary is reading a book that has 164 pages. John is reading a book that has has three times as many pages as Mary’s book. How many pages does John’s book have? Answer: 492

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

The sum of three consecutive numbers is 126. What is the smallest number? Answer: 41

What is the half of 254? Answer: 127

What is the product of 4.06 and 2.4? Answer: 9.744

What number is missing? 72, 64, 56, …, 40 Answer: 48

Exam number 2: Vượt chướng ngại vật


20 is 40% of what number? Answer: 50

A man walked a total of 70 miles for 5 days. Every day he walked 5 miles less than the day before. How many miles did the man walk the last day? Answer: 4

A shoe factory makes 350 pairs every hour. How many pairs of shoe are made in 4 hours? Answer: 1400

Barbara plans to leave her house 2 hours 15 minutes before the concert starts. At what time should she leave her house? Answer: 11:20 A.M

Every Angela’s birthday, she put as many pennies in a box as her age in years. She now has $3 in the box. How old is she? (Given: 100 pennies = 1 dollar) Answer: 24

Bài giải chi tiết:

If 2 pears weigh as much as 3 peaches, and 2 peaches weigh as much as 30 grapes, then … pears weigh as much as 180 grapes. Answer: 8

If 6/15 of my letters are bills then the ratio of the number of bills to the number of other letters is … Answer: 2:3

If my neck grows 4cm every 8 days, it takes … days for my neck to grow 32cm. Answer: 64


Jack got either a 90 or 100 on each of his 5 Math tests. The averge of all his  Math tests is 94. How many 100s did he get? Answer: 2


Peter is 13 years old. What is the average of his age 3 years ago and his age 5 years ago? Answer: 9

Sophia shared a sweet cấu kết with her friends. Which is the smallest? Answer: ½ of the cake

The sum of 3 consecutive whole number is 6048. What is the sum of all the digits of these 3 numbers? Answer: 27

Tiffany went to the bookstore. She spent 1/3 of her money on a pen and 3/7 of it on books. What fraction of her money did have left? Answer: 5/21

What is the value of this expression? 9 + 5 x (8 - 2) Answer: 39

Which decimals is equal to 3/8? Answer: 0.375

Which of following decimals is between 1/4 and 2/5? Answer: 0.3

Exam number 3: Talented Golden Toad

Add 29 to the greatest two - digit number then dividing the sum by 4 we get … Answer: 32

Anna draws bows: a yellow one, then a blue, then a red, then a black, then a yellow, a ble, a red, a black, and so on … What colour is the 2016th bow?   Answer: Black

Bob has 5/8 of a pizza. He eats 1/3 of original pizza at breakfast. What fraction of the original pizza does he have left? Answer: 7/24

How many pairs of parallel lines are there in this figure?   Answer: 8

In this figure, MNPQ is a square. Each its side is 13cm long. MGHQ is a rectangle. Its width is 10cm shorter than its length. The perimeter of the rectangle GNPH is … Answer: 46cm

Jeff, Josh and justin have 4 apples in total. In how many ways can it happen? (It is possible that not each of them has an apple). Answer: 15 ways

My birrthday is one day after Monday. Three days before my birthday was ... Answer: Saturday

The greatest fraction in the following group (2/3, 3/4, 4/5, 5/6) is … Answer: 5/6

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

The smallest natural number divisible by both 5 and 8 is … Answer: 0

What times is 25 minutes after 6:45? Answer: 7:10

When I look at the alphabet, I see that a letter has four times as many letters after it as before it. The letter is … Answer: U

Which of the following is not equal to 18/4? Answer: (36+1)/(8+1)

Các bạn có thể tải toàn bộ Đề và đáp án vòng 3 thi Toán trực tuyến quốc tế (Global ViOlympic) trình độ tiểu học (Primary) năm học 2015 - 2016 tại đây.

Exam number 1: Arrange


Exam number 2: Fill in the blank with the correct number

Question 1:

The side of each square grid is 2cm. Find the area of the shaded region.
Answer: The area of the shaded region is 30 cm².

Bài giải chi tiết:

Question 6:
A 6-digit number begins with the digit 7. The number is divisible by 9. All six digits of the number are different. Find the smallest possible value of this number?
Answer: 701235.

Question 3:
Complete the number pattern:
0, 3, 8, 15, 24, 35, 48.

Question 7:
Evaluate:
1/1x2 + 1/2x3 + 1/3x4 + ... + 1/99x100 = 0.99.
(write your answer by decimal in simplest form)

Question 9:
Evaluate:
.
(round to three decimal places)

Question 6:
Evaluate:
= 0.0164.
(round to four decimal places)

Bài giải chi tiết:

Question 4:
Find the area of the shaded region if A and B are squares of sides 5cm and 8cm respectively.

Answer: The area of the shaded region is 12.5 cm².
(write your answer by decimal in simplest form)

Question 2:
Find the missing numbers in the number patterns below:

Answer: x; y = 66;70.
(use ";" between the numbers)

Bài giải chi tiết:

Question 5:
Find the smallest possible value of the number 368abc so that it is divisible by 3,4 and by 25.
Answer: 368100.

Question 9:
Find the whole number A knowing that A is 9 units greater than the average of A, 38, 45 and 67.
Answer: A= 62.

Question 10:
Find the whole number B knowing that B is 19 units greater than the average of B, 98 and 125.
Answer: B= 140.

Question 10:
Find the whole number C knowing that C is 14 units smaller than the average of C, 68, 72, 99.
Answer: C= 61.

Question 7:
Given

Find the value of n in .
Answer: n= 4.

Bài giải chi tiết:

Question 5:
How many whole numbers between 1 and 100 are not divisible by 3 or 11?
Answer: 61 numbers.

Bài giải chi tiết:

Bài giải chi tiết:

Question 9:
Place 3 numbers (a;b;c) between 12 and 60 to make a sequence of 5 numbers with a common difference.
Answer: (a;b;c)=(24;36;48).
(use ";" between the numbers)

Question 8:
The sum of the areas of the two squares, A and B, is 202cm².
Find the perimeter of the figure.

Answer: The perimeter of the figure is 62 cm.

Bài giải chi tiết:

Question 10:
The average of all odd 3-digits numbers is 550.

Question 6:
What are the numbers in the twelfth group in the pattern below?
(1,4,8) (2,8,12) (3,12,16) ….
Answer: The twelfth group is (12;48;52).
(use ";" between the numbers in the group)

Bài giải chi tiết:

Question 8:
What is the largest possible value of a8949b if it is divisible by 11?
Answer: 989494.

Exam number 3: Obstacle

A bus travels 165 miles in 3 hours. What is its average speed? Answer: 55 mph

A shirt was originally $35 and is now 25% off. What is the sale price? Answer: $26.25

A soccer team played 47 games and won 33. Rounding to the nearest whole, how many percent 0f the games did the team win? Answer: 70%

Adam and Kevin are room mates. Adam can clean apartment in 45 minutes. Kevin can clean it in 60 minutes. Rounded to the nearest minute, how much time will it take if they work together? Answer: 26 minutes

Alvin is 3 years older than Brian. Brian is 5 years older than Melvin. The sum of their ages is 31. How old is Brian? Answer: 11 years old

Amy, Barry and Carter are building a fence. Together, it take them 4 hours. If Amy worked alone, it would take her 14 hours. If Carter worked alone, it would take him 16 hours. Rounded to the nearest hour, how long would it take Barry to build the fence alone? Answer: 9 hours

Andrew cleans his house for 5 hours and Emily cleans that house for 8 hours. Rounded to the nearest hour, how long will the job take if they work together? Answer: 3 hours

At a birthday party, there are 7 boys and 5 girls. What percent of the kids are boys, rounding to the nearest tenth of a percent? Answer: 58.3%

At a party, Martha pays $14.75 for food, John pays $18.25. How much money do they pay together? Answer: $33


Faith buys gifts for 5 friends. If each one costs $18, how mauch does she spend in total? Answer: $90

Find 458abc such that this number is the smallest and divisible by 3, 4 and 5. Answer: 458040

George earns $12 per hour painting house. If he works for 7 hours per day, how much does he earn? Answer: $84

How many endpoints does a line segment have? Answer: 2

How many total cookies can it hold? Answer: 24 cookies

If a cookie sheet holds 6 cookies along one side and 4 cookies along the other. What is 5 divided by 0.5? Answer: 10

John has $4.55 in his wallet and Lisa has $3.24. How much do they have in total? Answer: $7.79

Olivia rides her bike at an average speed of 12 miles per hour (mph) for 2 hours. How far does she go? Answer: 24 miles

This year, Karen’s age is a multiple of 5. Next year, her age will be a multiple of 3. Her age is more than 20 but less than 50. How old will Karen be six years from now? Answer: 41 years old

The average mass of Ken, David and Emily is 42kg. David is 6kg heavier than the average mass of Ken and Emily. Ken is 6kg heavier than Emily. Find David’s mass? Answer: 46kg

The average of A and B is 8. The average of B and C is 3.6. The average of C and D is 5.8. Find the average of A and D? Answer: 10.2


What is the total distance of four line segments that measure 1, 2, 2 and 3 inches respectively? Answer: 8 inches

Các bạn có thể tải toàn bộ Đề và đáp án vòng 4 thi Toán trực tuyến quốc tế (Global ViOlympic) trình độ tiểu học (Primary) năm học 2015 - 2016 tại đây.

Exam number 1: Find Equal Pairs


Exam number 2: Talented Golden Toad

a and b are the whole number. There are 10 consecutive whole numbers between a and b. Find the difference between a and b? Answer: 11

Given a fraction 46/67. If we add both its numerator and its denominator with X, the new fraction will equal to 3/4. The value of X is… Answer: 17

Given a rectangle. If we decrease the width by 1/5 of its value then the area will be decreased by 90cm². The ares of the rectangle is… Answer: 450cm²

How many 3 - digit number are smaller than 215? Answer: 115

How many 3 - digit odd number are divisible by 3? Answer: 150

If we double the radius of a circle, we will have a new circle with the area of 1256cm². The original area of the circle is … Answer: 314cm²

Bài giải chi tiết:

The area of a rectangle is 2352cm². The width equals to 75% the length. The perimeter of that rectangle is… Answer: 196cm

The average of 2 numbers is 186. Their difference is 36. The smaller number is… Answer: 168

The average of all 3 - digit even number that divisible by 9 is… Answer: 549

The sum of two number is 38 and their differenca is 12. The greater number is… Answer: 25

There are some balls in a box. One half of the balls are red, on third of the balls are blue, the rest are yellow. The ratio of yellow balls to the balls in the box is… Answer: 1/6


What is the 579th 3 - digit number? Answer: 678

Exam number 3: Intellectual Peaks

A teacher spends $60 to buy 5 of the same books. If the teacher buys such books for a class, how much money will she spend? Answer: 384


Find a fraction such that the sum of its numerator and its denominator is 285, and the value of that fraction is equal to 38/57. Answer: 114/171

Given 2 numbers m and n. the average of m and n is 198. m is greater than n by 18. m is… Answer: 207

Given that the sum of the ages of A and B is 56, and A is 28 years older than B. Find the ages of A and B. Answer: 42 and 14

Given two numbers a and b. Their sum is 274. If we subtract 8 from a and b then the value of a will be 2 times as large as the value of b. The value of a is… Answer: 180

How many 2 - digit even number? Answer: 45

How many 2 digit numbers are there that it equal to 7 times the sum of its digits? Answer: 4 (21; 42; 63; 84)

How many fraction equal to 38/57 such that its numerator has digits? Answer: 30


The averange of the consecutive natural numbers from 1 to 79 is… Answer: 40

The perimeter of a rectangle is 120cm. Given that the length is 8cm longer than the width of the rectangle is …cm. Answer: 26

The sum of 2 consecutive even numbers is 1362. Find the two numbers. Answer: 680 and 682
The sum of 3 consecutive even numbers is 558. The greatest number among 3 number is… Answer: 188

The sum of two even numbers a and b is 210 and there are 18 even numbers between a and b. Find two numbers a and b. Answer: 86 and 124

There are 180 students in camp A and B in total. If 9 students move from camp A to B, the number od students in 2 camps are equal. How many students are there in each camp? Answer: 99 and 81

Các bạn có thể tải toàn bộ Đề và đáp án vòng 5 thi Toán trực tuyến quốc tế (Global ViOlympic) trình độ tiểu học (Primary) năm học 2015 - 2016 tại đây.

Exam number 1: Talented Golden Toad

Benjamin earns $8.00 per hour working. If he works for 9 hours, how much money will Benjamin earn? Answer: $72

Calculate: 1600 ÷ 5 = … Answer: 320

Given the numbers sequence 1, 5, 6, 6, 12,… Find the 15th tern of the numbers sequence? Answer: 57

Given the numbers sequence 3, 6, 9, 12,… Find the 2016th tern of the numbers sequence? Answer: 6048

In the following number, which number is divisible by 4? Answer: 2016

Lily’s average mark for the first 4 exams in a year was 76. To raise her average mark to 80, the mark of her last exam must be… Answer: 96

Marilyn spends $27.00 on eggs. Each egg costs $3.00. How many egg did Marilyn buy? Answer: 9

The area of rectangle ABCD is 36cm². Given a random point E inside of ABCD. Find the total area of triangles AED and BEC. Answer: 18cm²

The average of 2 numbers is 123. Their difference is 6. The smaller number is… Answer: 120

 
Exam number 2: Obstacle

53,184.905	35,640.178	20,539.541
6,218.059	4,153.342	3,805.725

How many of the six numbers shown in the table above have 5 in either the hundredths place or thousands place? Answer: 2

After buying some candies for $96.35. Todd has $38.15 left. How much money did Todd have at first? Answer: $134.5

Given the numbers sequence 1, 5, 9, 13, … Which tern of the numbers sequence is 85? Answer: 22

Given the numbers sequence 3, 6, 9, 12, … Which tern of the numbers sequence is 150? Answer: 50

If 4567m is divisible by 3, find the possible value of m. Answer: 2

If 4567m is divisible by 9, find the possible value of m. Answer: 5

In the following number, which number is divisible by 9. Answer: 2016

It took Anna 18 minutes to walk to the library at a speed of 40 m/minute. She returned from the libraby at a speed of 60 m/minute. What was her average speed for the whole trip? Answer: 48 m/minute

It took Sam 20 minutes to go to school at a speed of 21 km/h. She returned from the libraby at a speed of 14 km/h. What was her average speed for the whole trip? Answer: 16.8 km/h

Bài giải chi tiết:

Marie has $83.00. Dennis has $7.00. Ryan has $18.00. How much money does Marie have more than Dennis? Answer: $76

Bài giải chi tiết:

The average of 2 numbers is 14. Their difference is 8. The greater than number is… Answer: 18

The last 4 digits in the result of the following equation are… 2 + 33 +444 + 5555 + 66666 + 777777 + 8888888. Answer: 9365

 
Exam number 3: Fill >; < ; = in the blank with suitable mark!

Question 1:
Roo wants to tell Kanga a number whose digits have a product of 24. What is the sum of the digits of the smallest number Roo could choose?
Answer: 11

Bài giải chi tiết:

Question 2:
It is true that 1111/101 = 11. What is the value of 3333/101 + 6666/303 ?
Answer: 55

Question 3:
The sum of 2 numbers a and b is 210 and there are 17 consecutive numbers between a and b. Find the smaller number
Answer: 96

Bài giải chi tiết:

Question 4:
What is the last 3 digits in the result of the following equation: 555 555+6 666 666+77 777 777+888 888 888+9 999 999 999?
Answer: 885

Question 5:
If Anna can eat 2 ice creams every 30 minutes then how many ice creams will she eat in 2 hours?
Answer: 8 ice creams.

Question 6:
The perimeter of a rectangle is 450cm.The width equals to 25% the length.The area of the rectangle is 8100 cm²

Bài giải chi tiết:

Question 7:
9 minutes 9 seconds = 549 seconds

Question 8:
A 6- distinct digit number is divisible by 9.If it begins with the digit 7 thenits smallest possible value is 701235

Question 9:
Ann has the square sheet of paper shown in the left-hand diagram. By cutting along lines of the square, she produces copies of the shape shown in the right-handdiagram. The smallest possible number of cells she can leave unused is 4

Bài giải chi tiết:

Question 10:
A 5- distinct digit number is divisible by 9. If it begins with the digit 6 thenits smallest possible value is 60129

Tài khoản Dropbox của mình là tài khoản miễn phí. Do có nhiều người tải dữ liệu xuống nên Dropbox đã tạm thời khoá các đường link, không cho tải các file chia sẻ của mình nữa. Việc thay thế toàn bộ các đường link trên ở từng bài viết sẽ mất rất nhiều thời gian. Vì vậy mình xin phép gộp toàn bộ các file trên thành một file duy nhất và chuyển sang sử dụng dịch vụ lưu trữ khác. Thành thật xin lỗi các bạn vì sự bất tiện này.

Các bạn có thể tải toàn bộ Đề và đáp án từ vòng 1 đến vòng 5 thi Toán trực tuyến quốc tế (Global ViOlympic) trình độ tiểu học (Primary) năm học 2015 - 2016 tại đây hoặc đây.

trangnt đã viết:Chào thầy Thaodo! Em muốn nhờ thầy dịch và hướng dẫn giúp em câu này ở đề số 2 với ạ.
Cám ơn thầy rất nhiều!
If my neck grows 4cm every days, it takes … days for my neck to grow 32cm. Answer: 64

Cám ơn bạn đã phát hiện. Do lỗi đánh máy nên đề bị thiếu mất số 8, đề và đáp án đúng là:

If my neck grows 4cm every 8 days, it takes … days for my neck to grow 32cm. Answer: 64

Tạm dịch:

Giải:

Lan đã viết:Các thầy cô cho em xin đề ôn thi toán tiếng anh lớp 4 trên mạng vòng thi cấp tỉnh ạ! Em cảm ơn nhiều

Bạn có thể xem và tải: Đề và đáp án ôn thi vòng 9 (vòng tỉnh) Toán tiếng Anh (Math ViOlympic) lớp 4 NH 2016 - 2017 tại đây.

THẦY ƠI, BÀI NÀY GIẢI THẾ NÀO Ạ?
Jane is 15 years old. She is twice as old as Mary was when Jane was as old as Mary is now. How old is Mary now? Answer: 10

ngoccam đã viết:

THẦY ƠI, BÀI NÀY GIẢI THẾ NÀO Ạ?
Jane is 15 years old. She is twice as old as Mary was when Jane was as old as Mary is now. How old is Mary now? Answer: 10

Tạm dịch:

Giải:

Tuổi Mary trước đây: I-----I
Tuổi Jane trước đây: I-----I-----I
Tuổi Mary hiện nay: I-----I-----I
Tuổi Jane hiện nay: I-----I-----I-----I 15 tuổi
15 tuổi tương ứng với 3 phần bằng nhau. Suy ra: 1 phần là: 15 : 3 = 5 (tuổi).
Tuổi Mary hiện nay là: 5 x 2 = 10 (tuổi).

dengbui đã viết:Vòng 2 bài thi số 3 là bài sắp xếp chứ bạn ThaoDo!

Đề nghị bạn đọc kỹ lại tiêu đề bài viết của mình.