Đề thi Violympic Toán Tiếng Anh lớp 4 vòng 10 năm 2014 - 2015

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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