Playing with Numbers (IMO Level 1- Mathematics Olympiad (SOF) Class 6): Questions 9 - 18 of 86

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Question number: 9

» Playing with Numbers

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MCQ▾

Question

The two numbers nearest to 2000 which are exactly divisible by each of 2,3, 4,5 and 6 is

Choices

Choice (4) Response

a.

1860,2220

b.

1969,2220

c.

1940,2220

d.

1970,2220

Question number: 10

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MCQ▾

Question

Which of the following is not a perfect cube?

Choices

Choice (4) Response

a.

216

b.

512

c.

342

d.

27

Question number: 11

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Question

The numbers which are multiplies of 2 are called________.

Choices

Choice (4) Response

a.

Odd

b.

Composite

c.

Prime

d.

Even

Question number: 12

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Question

The smallest value of ‘x’ in the number 156 × 0 so that it is divisible by10 is:

Choices

Choice (4) Response

a.

2

b.

1

c.

0

d.

All a. , b. and c. are correct

Question number: 13

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MCQ▾

Question

is divisible by

Choices

Choice (4) Response

a.

7

b.

9

c.

11

d.

3

Question number: 14

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MCQ▾

Question

The least number which when increased by 6 is exactly divisible by 12,24 and 48 is

Choices

Choice (4) Response

a.

23

b.

54

c.

36

d.

42

Question number: 15

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Question

The reciprocal of the smallest prime is

Choices

Choice (4) Response

a.

0

b.

2

c.

1

d.

Question number: 16

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MCQ▾

Question

Which of the following is a perfect square?

Choices

Choice (4) Response

a.

49

b.

68

c.

56

d.

48

Question number: 17

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MCQ▾

Question

Which of the following is the pair of twin primes?

Choices

Choice (4) Response

a.

(5,11)

b.

(7,11)

c.

(17,19)

d.

(19,23)

Question number: 18

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Question

The HCF of two numbers is 54. If one number is 27 and another is 162, then the LCM is

Choices

Choice (4) Response

a.

81

b.

51

c.

85

d.

31

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