lop 4 bo de thi violympic toan tieng anh tat ca cac vong co dap an

Đề thi Violympic Toán Tiếng Anh lớp 4 vòng 8 năm 2015 - 2016
Exam number 1: Đỉnh núi trí tuệ
Question 1: If x/7 = 45/63 then x = .............
Question 2: An even number M is divisble by 5 if the last digit of M is ............
Question 3: Find the area of the parallelogram below:

Question 4: Calculate: 6520 : 326 = .............
Question 5: Katie has 300 cakes. She gives 12 of them to each of five her friends. How
many cakes are left over
Question 6: Find the value of b such that the number 73b4 is divisible by 9?
Question 7: The sum of two numbers is 124 and their difference is 36. What is the value
of the larger number?
Question 8: One pack of pencils has fifteen pencils. Four other packs have twenty pencil
each. What is the total pencils in these five packs?
Question 9: 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.
Question 10: The sum of all natural numbers that are smaller than 500 and divisible by 5
is ............
Question 10: The sum of all natural numbers that are smaller than 500 and divisible by 5
is ............
Exam number 2: Tìm cặp bằng nhau

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Exam number 3: Vượt chướng ngại vật
Question 1: The area of this parallelogram is ...........cm2.
a. 48

b. 20

c. 28

d. 35

Question 2: What is this fraction in the simplest terms?
27/36 = ..........
a. 9/4

b. 2/3

c. 3/4

d. 4/9

Question 2: What is this fraction in the simplest terms?
27/36 = ..........
a. 9/4

b. 2/3

c. 3/4

d. 4/9

Question 3: Which of the following lists the fractions 1/9; 2/7; 4/16; 2/9; and 1/8 in order
from the least to greatest?
a. 1/9 < 2/9 < 1/8 < 4/16 < 2/7
b. 1/9 < 2/9 < 1/8 < 2/7 < 4/16
c. 1/9 < 1/8 < 2/9 < 4/16 < 2/7
d. 1/9 < 1/8 < 2/9 < 2/7 < 4/16

Question 4: Peter is taller than Edward but shorter than Jacob. Charlie is taller than John
but shorter than Peter. Who is the tallest?
a. Jacob

b. Peter

c. Charlie

d. Edward

Question 5: The total weight of 3 apples is equal to that of 4 bananas, and the total weight
of 5 bananas is equal to that of 6 oranges. How many apples have the same total weight
as 24 oranges?

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a. 18

b. 16

c. 12

d. 15

Đáp án
Exam number 1: Đỉnh núi trí tuệ
Question 1: 5
Question 2: 0
Question 3: 40

Question 4: 20
Question 5: 240
Question 6: 4
Question 7: 80
Question 8: 95
Question 9: 12
Question 10: 24750
Các số tự nhiên nhỏ hơn 500 chia hết cho 5 là: 0; 5; 10; 15; ............; 495
Số các số tự nhiên nhỏ hơn 500 chia hết cho 5 là: (495 - 0) : 5 + 1 = 100 (số)
Tổng của chúng là: (495 + 0) x 100 : 2 = 24750
Exam number 2: Tìm cặp bằng nhau
(1) = (9); (2) = (15); (3) = (10); (4) = (12); (5) = (17); (6) = (13); (7) = (14); (8) = (11);
(16) = (18); (19) = (20)
Exam number 3: Vượt chướng ngại vật
Question 1: c
Question 2: c
Question 3: c
Question 4: a
Question 5: d

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Đề thi Violympic Toán Tiếng Anh lớp 4 vòng 9 năm 2014 - 2015
Exam number 1: Fill in the blank with the suitable number
Question 1: Mary reads four books every month. She is busy and reads only one book on
March. On September, she takes a break and does not read any books. What is the
number of books that Anna reads in one year?
Question 2: Four boxes of chocolate candies are equivalent to eight hundred candies. The
number of candies is the same for all boxes. How many candies are in each box?

Question 3: If y is a natural number and y/9 < 7/12 then the greatest value of y is ...........
Question 4: 5/4 of 2 kg is ........... g.
Question 5: Calculate: (247 x 315 + 246 x 314) x (98 x 47 - 94 x 49) = ............
Question 6: If x is a natural number and 7/9 < x/12 then the smallest value of x is ............
Question 7: The product of four consecutive natural numbers is 570024. Their sum
is ...............
Question 8: The smallest number such that the product of all it's digits is 20 is ............
Question 9: If B is not divisibly by 24 and B is the greatest 5-digit number that the sum of
all digits is 21 then B = ...........
Question 10: If 324/483 = 108/x then the value of x is ...............
Exam number 2: Help the Miners to go through the maze by answering questions to
reach the destination. (Đi tìm kho báu)

Question 1: Calculate:
Question 2: Add and simplify your answer: 1/5 + 3/10 + 1/2 = .............
Question 3: Find x if
Question 4: Calculate: 7/45 + 5/3 - 7/5 = ...........
Question 5: Find y if y x 168 = 23 + 25 + 27 + ..... + 105
Exam number 3: Choose the most suitable answer in 4 available answers. (Cóc vàng
tài ba)
Question 1: Which of the following calculations euqals 5/36?
a. 1/2 + 1/3 x 1/6
b. 1/9 + 5/12 - 7/18
c. (1/2 + 1/3) : 1/6
d. 1/2 + 1/3 : 1/6
Question 2: Jane bought 4 products on 2 types. Their price was shown in the table:

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She paid $80 and had $5 left. How many products on type 1 did she buy?
a. 1

b. 4

c. 3

d. 2

Question 3: Which of the following fractions is the greatest?
a. 8/15

b. 7/12

c. 17/30

d. 1/2

Question 4: Sara's car weighs 41/6 tons and Anna's car weighs 3 tons. Which of the
following statements is true?
a. Anna's car weighs 25/6 tons more than Sara's car.
b. Sara's car weighs 25/6 tons more than Anna's car.
c. Anna's car weighs 23/6 tons more than Sara's car.
d. Sara's car weighs 23/6 tons more than Anna's car.
Question 5: The sum of odd numbers from 823 to 2015 is ..............
a. 818763

b. 847143

c. 845724

d. 844305

Question 6: Let A = abc x dec. Which of the following numbers can not be A?
a. 40302

b. 27336

c. 53064

d. 72541

Question 7: Which of the following numbers is in the sequence: 25; 28; 31; 34; 37; ..........
a. 2014

b. 22

c. 1235

d. 16

Question 8: Bob buys three times as many apples as Peter. Mia buys 7 apples more than
Bob and 19 apples more than Peter. How many apples do they buy together? Choose the
correct answer.
a. 26 apples

b. 37 apples

c. 49 apples

d. 51 apples

Question 9: How many natural numbers between 1000 and 4000 are there for which the
thousands digit equals the sum of the other three digits?
a. 20

b. 19

c. 16

d. 12

Question 10: Let M = 91011121314..... (M is written by consecutive natural numbers)
If M has 175 digits then when M divided by 5, the remaider is ..........
a. 2

b. 1

c. 0

d. 3

Đáp án
Exam number 1: Fill in the blank with the suitable number
Question 1: 41

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Mary đọc 4 cuốn sách mỗi tháng. Cô ấy rất bận và chỉ đọc một cuốn vào tháng Ba. Vào

tháng 9, cô ấy nghỉ ngơi và không đọc bất kỳ cuốn sách nào. Hỏi số sách mà Anna đã đọc
trong một năm là bao nhiêu?
Question 2: 200
Question 3: 5
Question 4: 2500
Question 5: 0
Question 6: 10
Question 7: 142503
Question 8: 299
Question 9: 99300
Question 10: 161
Exam number 2: Help the Miners to go through the maze by answering questions to reach
the destination. (Đi tìm kho báu)
Question 1: 0
Question 2: 1
Question 3: 1/20
Question 4: 19/45
Question 5: 16
Exam number 3: Choose the most suitable answer in 4 available answers. (Cóc vàng tài
ba)
Question 1: b
Question 2: a
Question 3: b
Question 4: d
Question 5: b
Question 6: a
Question 7: a
Question 8: c
Question 9: b
Question 10: b

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Đề thi Violympic Toán Tiếng Anh lớp 4 vòng 9 năm 2015 - 2016
Exam number 1: Fill in the blank with the suitable number
Question 1: The expression 4 x 1000 + 5 x 100 + 4 x 1 is equal to ..............
Question 2: What number should be placed in the box to make ?

Question 3: What is the remainder when 65870 is divided by 8?
Question 4: Mya has 10000 dollars in bills of 40 dollars.How many 40 dollars- bills does
she have?
Question 5: A large box of candies and a small box of candies together cost 13 dollars. If
the large box costs 5 dollars more than the small box, what is the price of the small box of
candies?
Question 6: Six students had an orange eating contest. The graph shows the number of
oranges eaten by each student. Mary ate the fewest oranges and Jack ate the greatest.
How many more oranges did Jack eat than Mary?

Question 7: The numbers from 1 to 1000 are written. How many of these numbers have at
least two digits 5?
Question 8: Five students do an exam with a maximum score of 50. The scores of four of
the students are 41, 44, 46 and 49. The average of five students’ scores is the same as the
score of the fifth student. The score of the fifth student is .............
Question 9: Five years ago, Sarah was 7 years old. Two years later, she will be .............
years old.
Question 10: A fraction is equal to 2/5. The sum of its denominator and its numerator is
91. What is the difference between the denominator and numerator of this fraction?
Exam number 2: Đi tìm kho báu
Question 1: Nick has 3/5 of a dollar and Emma has 3/10 of a dollar. Together they

have ………….
a. $6/10

b. $8/10

c. $9/10

d. $15/10

Question 2: The value of 1/12 : 1/8 = ………….

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Question 3: The symbol

If

is evaluated as 4 x 7 – 3 x 6 = 10.

then the number that should be replaced in the question mark is ……………

Question 4: The are of a rectangular garden is 36m2. Its has a length of 9m. Its perimeter,
in metres, is ……………..
Question 5: Last year, Bob’s age is divided by 7. This year, his age is divisible by 5. In
how many years will Bob be 27 years old?
Exam number 3: Cóc vàng tài ba
Question 1: The value of 40 + 60000 + 500 + 30 is ………….
a. 65070

b. 65430

c. 60570

d. 60543

Question 2: The average of the numbers 21, 23, 25 and 27 is ……………….
a. 22

b. 23

c. 24

d. 26

Question 3: The perimeter of a rectangular is 3 times its length. If the perimeter is 120cm,
the area of the rectangle is …………
a. 3200cm

b. 800cm

c. 800cm2

d. 3200cm2

Question 4: Which number should be replace the blank:

a. 32

b. 96

c. 48

d. 24

Question 5: Sophia plants ten trees every three minutes. If she continues planting at the
same rate, how long will it take she to plant 250 trees?
a. 5/4 h

b. 25h

c. 3/4 h

d. 75h

Question 6: Anna scored 325 points during the badminton season. If her average point
was 13 per game, how many games did she play?
a. 25

b. 13

c. 26

d. 14

Question 7: If a machine produces 90 items in one minute, how many items would it
produce in 20 second?
a. 180

b. 20

c. 30

d. 60

Question 8: The digits 1, 2, 3, 4, 5 and 6 are each placed in one of the boxes so that the
resulting product is correct. If each of the six digits is used exactly once, the digit
represented by’?” is ………….

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a. 6

b. 2

c. 3

d. 4

Question 9: The average of five different natural numbers is 4. If the different between
the largest and smallest of these numbers is as large as possible, what is the average of the
other three numbers?
a. 5

b. 2

c. 3

d. 6

Đáp án
Exam number 1: Fill in the blank with the suitable number
Question 1: 4504
Question 2: 18
Question 3: 6
Question 4: 250
Question 5: 4
Question 6: 5
Question 7: 19
Question 8: 45
Question 9: 14
Question 10: 39
Exam number 2: Đi tìm kho báu
Question 1:c
Question 2: 2/3
Question 3: 2
Question 4: 26
Question 5: 12
Exam number 3: Cóc vàng tài ba
Question 1: c
Question 2: c
Question 3: c
Question 4: b

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Question 5: a
Question 6: a

Question 7: c
Question 8: c
Question 9: c

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Đề thi Violympic Toán Tiếng Anh lớp 4 vòng 10 năm 2014 - 2015
Exam number 1: Fill in the blank with the suitable sign (>, <, =)
Question 1: 4567/6789 ............ 3456/5678
Fill in the blank with the suitable number:
Question 2: Professor Ngo Bao Chau was born in 1972. He was born in the .......... th
century.
Question 3: 1818/2727 of 2376 is ...........
Question 4: Find x such that: x + 17 x 12 = 216
Question 5: Three oranges are weighted in pairs and these weights are 400; 412; and 424
gram. What is the weight of the lightest orange?
Answer: The weight of the lightest orange is .......... gram.
Question 6: The area of a rectangle increased by 57cm2 when each side increases by 3cm.
The perimeter of the origial rectangle is ............. cm.
Question 7: How many 4 - digit numbers can you make by using only 0 and 1?
Answer: There are ......... numbers.
Question 8: Some men meet at a conference. Each man shakes hands with each other
exactly once. If there are 4950 handshakes in total then the number of men is ..............
Question 9: In the equation: N x U x (M + B + E + R) = 33, six letters are 6 distinct digits
from 0 to 9. What is the greatest possible value of the number NUMBER?
Question 10: The sum of the digits of all 2-digit numbers is .............
Exam number 2: Choose the most suitable answer in 4 available answers. (Cóc vàng
tài ba)
Question 1: Which of the following numbers can represent the question mark?

a. 48

b. 45

c. 54

d. 36

Question 2: Which of the following numbers is divisible by 6?
a. 33332

b. 25760

c. 42378

d. 12357

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Question 3: Which of the following is the number 2,003,047?
a. Two million, three thousand, fourty seven
b. Two million, thirty thousand, four seven
c. Two million, three thousand, four seven
d. Two million, thirty thousand, fourty seven
Question 4: Find the value of

The value of A is ..........
a. 1007

b. 4006/2015

c. 2015

d. 4002/2015

Question 5: Jonn uses 1/3 of his land for growing apples, 1/4 for oranges, 1/5 for bananas
and the remaining 13 hectares for flowers. The total area of his land is ............ hectares.
a. 60

b. 70

c. 50

d. 80

Question 6: Find the value of B = 2016 x 20152015 - 2015 x 20162015
Answer: The value of B is .........
a. 2015

b. 2016

c. 20152016

d. 20162015

Question 7: The product of 2 natural numbers is 2015. Find the smallest possible sum of
these two numbers?
Answer: The smallest possible sum of these numbers is ...............

a. 96b

. 65

c. 408

d. 2016

Question 8: Peter, Bob and Jack do a work. If they work in pairs: Peter and Bob can
complete it in 12 hours; Bob and Jack can complete it in 10 hours; Jack and Peter can
complete it in 15 hours. Peter needs ........ hours to complete this work by himself.
a. 18

b. 40

c. 24

d. 42

Question 9: One chain with 3 links is 14cm long. Another chain made from 5 links of the
same type is 22cm long. How long is a chain with 40 such links?
Answer: A chain with 40 such links is ............
a. 162cm long
b. 158cm long
c. 160cm long
d. 155cm long
Question 10: Find the missing number x in the following number sequence:
2

9

18

25

x

57

114

121

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Answer: x is ..........
a. 32

b. 34

c. 50

d. 45

Exam number 3: Vượt chướng ngại vật
Question 1: Fill in the blank with the correct number
35km + 700cm = ......... m
Question 2: 765 - ........ = 123 x 2 + 276
The correct number filled in the blank is ...........

Question 3: How many triangles in the following figure?

Answer: There are ................ triangles.
Question 4: Find the value of digit x if 2006 < 20x5 < 2041 and 20x5 is divisible by 3?
Answer: The value of x is ................
Question 5: Find the greatest natural number m such that:

12
8
21


17 5  m 23

Answer: m = ............
Đáp án
Exam number 1: Fill in the blank with the suitable sign (>, <, =)
Question 1: >
Question 2: 20
Question 3: 1584
Question 4: 12
Question 5: 194
Question 6: 32
Question 7: 8
Question 8: 100
Question 9: 315420

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Question 10: 855
Exam number 2: Choose the most suitable answer in 4 available answers. (Cóc vàng tài
ba)
Question 1: a
Question 2: c
Question 3: a
Question 4: a
Question 5: a
Question 6: a
Question 7: a
Question 8: b
Question 9: a
Question 10: c
Exam number 3: Vượt chướng ngại vật
Question 1: 35007
Question 2: 243
Question 3: 15
Question 4: 2
Question 5: 6

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Đề thi Violympic Toán Tiếng Anh lớp 4 vòng 1 năm 2015 - 2016
Exam number 1: Fill in the blank with the suitable number.
Question 1: How many days are there in September?
Question 2: Find x such that x : 5 = 1537
Question 3: Mary learns fifteen new words per day. How many new words does she learn
for seven days?
Question 4: The area of the following rectangle is ............ cm2.

Question 5: The perimeter of the following square is .................cm.

Question 6: Calculate: (12639 + 21034) x 2 = ...........
Question 7: Bella goes to the zoo. She makes a table of the number of animals at the zoo.
(see the table below)

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How many monkeys and birds are there?
Question 8: Calculate: 9876 : 6 x 6 = ..........
Question 9: How many right angles are there?

Question 10: There are 48 strawberries in 6 bags. How many strawberries are there in 9
bags?

Exam number 2: Choose the most suitable answer in 4 available answers.
Question 1: Calculate: 6723 - 2195 = .........
A. 4258

B. 4285

C. 4528

D. 4582

Question 2: Emma is 14 years old. Her sister's age is 11 years more than her age. How old
is Emma's sister?
A. 25

B. 23

C. 13

D. 15

Question 3: What time does the clock show?

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A. 2 : 50

B. 2 : 10

C. 10 : 20

D. 10 : 10

Question 4: Mary goes swimming in the morning. What time can she go swimming?
A. 10:00 a.m

B. 16:00

C. 6:00 p.m

D. 14:00

Question 5: Which number can replace the question mark?

400 x ? + 800 = 2000
A. 3

B. 6

C. 30

D. 60

Question 6: Find the value of x such that x + 1606 = 2357.
A. 751

B. 715

C. 716

D. 761

Question 7: Today is Thursday, December 17. Which day of the week is the day before
yesterday?
A. Wednesday

B. Tuesday

C. Friday

D. Saturday

Question 8: Two numbers have the product of 9315. If the product is five times as same
as the greater number. The smaller number is ..........

A. 1863

B. 4

C. 1763

D. 5

ĐÁP ÁN
Exam number 1: Fill in the blank with the suitable number.
Question 1: 30

Question 2: 7685

Question 3: 105

Question 5: 492

Question 6: 67346

Question 7: 539

Question 4: 135

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Question 8: 9876

Question 9: 5

Question 10: 72

Exam number 2: Choose the most suitable answer in 4 available answers.
Question 1: C

Question 2: A

Question 3: D

Question 4: A

Question 5: A

Question 6: A

Question 7: B

Question 8: D

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Đề thi Violympic Toán Tiếng Anh lớp 4 vòng 2 năm 2015 - 2016
Bài 1: Tìm cặp bằng nhau

Bài 2: Đỉnh núi trí tuệ Let reach the intellectual peak by answering the questions.
Câu 2.1. Calculate: 2100 x 4 = ............
A. 4600

B. 4800

C. 8400

D. 8600

Câu 2.2: 38000; 39000; .......; 41000; 42000
The correct number fill the blank is ...........
A. 400000

B. 400

C. 40000

D. 4000

Câu 2.3: Which of following numbers is the greatest?
A. 3472

B. 4732

C. 3742

D. 4372

Câu 2.4: The perimeter of the figure below is .......... cm.

A. 20

B. 19

C. 21

D. 18

Câu 2.5: Which of following is true?
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A. 9000 x 2 > 6000 x 3
B. 4000 x 8 < 6000 x 4
C. 3000 x 2 = 2000 x 3
D. 8000 x 3 > 6000 x 4
Câu 2.6: Solve: 8 thousands = ............ Tens. The correct number fill in the box is ...........
A. 8000

B. 800

C. 80

D. 8

Câu 2.7: What natural number is just before of 134?
A. 133

B. 136

C. 135

D. 132

Câu 2.8: What number is 100 + 3000 + 20 + 7?
A. 1327

B. 1372

C. 3127

D. 2317

Câu 2.9: The value of P is ...........

A. 1500

B. 600

C. 900

D. 100

Câu 2.10: Find x such that x is a natural number and 76 < x < 78
A. 76

B. 78

C. 79

D. 77

Bài 3: Vượt chướng ngại vật

Câu 3.1: Calculate: 95213 - 8756 = ..........
Câu: 3.2: 982605
The number's underlined digit is worth ..........
Câu 3.3: Just before of 300000 is .............
Câu 3.4: The value of expression: 3148 + 2672 : 4 is .................
Câu: 3.5: 98247 < 9x134
ĐÁP ÁN
Bài 1: Tìm cặp bằng nhau
8000 : 4 = 5000 - 3000; 9000 + 30 + 4 = 9034; 9000 + 2000 + 4000 = 5000 x 3; 9000 +
300 + 4 = 9304; 5632 + 6872 = 3126 x 4; 8724 + 7373 = 6785 + 9312; 9000 - 4000 +

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2000 = 9000 - (4000 - 2000); 9000 - 3000 = 4000 + 2000; 9000 + 40 + 3 = 9043; 9000 +
400 + 3 = 9403
Bài 2: Đỉnh núi trí tuệ Let reach the intellectual peak by answering the questions.
Câu 2.1: C

Câu 2.2: C

Câu 2.3: B

Câu 2.5: C

Câu 2.6: B

Câu 2.7: A

Câu 2.8: C

Câu 2.9: C

Câu 2.10: D

Câu 2.4: A

Bài 3: Vượt chướng ngại vật
Câu 3.1: 86457
Câu 3.2: 2000
Câu 3.3: 299999
Câu 3.4: 3816
Câu 3.5: 9

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Đề thi Violympic Toán Tiếng Anh lớp 4 vòng 3 năm 2015 - 2016
Bài 1: Fill in the blank with the suitable number
Question 1: How many hours are there in 4 days?
Question 2: Calculate: 672g – 276g = ........... g.
Question 3: How many years are in 3 century?
Question 4: There are ................ days in May.
Question 5: Emily write down how many kilometers she walked each day.

How many kilometers did she walk on Sunday?
Question 6: 765 + … = 459 + 541
The missing number is ..........
Question 7: Write forty-six thousand and fifty using digits.
Bài 2: Cóc vàng tài ba: Choose the most suitable answer in 4 available answers.

Question 1: 1/4 century = ........... years. The missing number is ..............
A. 20

B. 30

C. 25

D. 15

Question 2: What time does the clock shown?

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A. 6: 20

B. 4: 06

C. 4: 30

D. 6: 25

Question 3: Find x such that x + 215 = 432
A. 657

B. 647

C. 217

D. 227

Question 4: 5kg = ........... g. The missing number is ...............
A. 5000

B. 50

C. 50000

D. 500

Question 5:

A. 75

B. 79

C. 77

D. 76

Question 6: 5250g + 1750g = ............kg. The missing number is ..............
A. 7

B. 100

C. 70

D. 10

Question 7: If m = 7 then 2000 x 3 + 2000 x m = ..........

A. 9000

B. 20000

C. 2000

D. 20000

Question 8: The average of 75 and M is 82. The value of M is ............
A. 89

B. 86

C. 85

D. 79

Question 9: Today is September 2nd, four days ago is ............
A. August 28th

B. August 30th

C. August 29th

D. August 27th

Question 10:

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A. 6

B. 3

D. 5

C. 4

ĐÁP ÁN
Bài 1: Fill in the blank with the suitable number
Question 1: 96

Question 2: 396

Question 3: 300

Question 5: 8

Question 6: 235

Question 7: 46050

Question 4: 31

Bài 2: Cóc vàng tài ba: Choose the most suitable answer in 4 available answers.
Question 1: C

Question 2: C

Question 3: C

Question 5: C

Question 6: A

Question 7: B

Question 8: A

Question 9: C

Question 10: D

Question 4: A

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Đề thi Violympic Toán tiếng Anh lớp 4 vòng 4 năm 2015 - 2016
Exam number 1: Đi tìm kho báu
Question 1: 2 minutes 30 seconds = ......... seconds
Question 2: Calculate: 3512 + 4231 = .........
Question 3: The value of 6132 + 1584 is ........
Question 4: Subtract: 7000 - 4325 = ...........
Question 5: Find x such that x - 582 = 964
Exam number 2: Chọn các cặp giá trị bằng nhau

Exam number 3: Vượt chướng ngại vật
Question 1: If m = 16 and p = 75 then m + p = .........

Question 2: Write >; =; <: 3676 + 2015 ....... 2015 + 3676
Question 3: If a = 6 and b = 12 then 15 + a x b = .........
Question 4: There are 786 boy students and 572 girl students in a school. How many
students are there in the school?
Question 5: Think of a number that when you add 130 to it the answer will be 500.

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