Playing with Numbers [IMO Level 1- Mathematics Olympiad (SOF) Class 6]: Questions 1 - 8 of 86

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Question 1

Playing with Numbers

Question

MCQ▾

A number is always divisible by 90 if

Choices

Choice (4)Response

a.

It is divisible by both 2 and 45

b.

It is divisible by both 5 and 18

c.

It is divisible by both 9 and 10

d.

All a., b. and c. are correct

Question 2

Playing with Numbers

Question

MCQ▾

The prime number that is placed at fifth after prime number 7 is

Choices

Choice (4)Response

a.

27

b.

19

c.

23

d.

29

Question 3

Playing with Numbers

Question

MCQ▾

Observe the following patterns. Then find the sum of .

… ‎ …

Choices

Choice (4)Response

a.

81

b.

121

c.

64

d.

100

Question 4

Playing with Numbers

Question

MCQ▾

The number (12,7) are

Choices

Choice (4)Response

a.

Co-prime numbers

b.

Prime and co-prime

c.

Prime numbers

d.

None of the above

Question 5

Playing with Numbers

Question

MCQ▾

1265 is divisible by

Choices

Choice (4)Response

a.

10

b.

11

c.

3

d.

2

Question 6

Playing with Numbers

Question

MCQ▾

There are 207 white balls and 115 blue balls. These balls are to be arranged in buckets containing the same number of balls. Then the greatest number of balls possible in each bucket is

Choices

Choice (4)Response

a.

23

b.

18

c.

28

d.

217

Question 7

Playing with Numbers

Question

MCQ▾

The number 6,43, 590 is divisible by

Choices

Choice (4)Response

a.

6

b.

3

c.

2

d.

All a., b. and c. are correct

Question 8

Playing with Numbers

Question

MCQ▾

Number of prime numbers from 20 to 70 are

Choices

Choice (4)Response

a.

9

b.

13

c.

11

d.

16

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