Playing With Numbers (IMO- Mathematics Olympiad Class 6): Questions 8 - 17 of 86

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Question number: 8

» Playing With Numbers

MCQ▾

Question

Number of prime numbers from 20 to 70 are

Choices

Choice (4) Response

a.

11

b.

9

c.

16

d.

13

Question number: 9

» Playing With Numbers

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.

1970, 2220

b.

1969, 2220

c.

1860, 2220

d.

1940, 2220

Question number: 10

» Playing With Numbers

MCQ▾

Question

Which of the following is not a perfect cube?

Choices

Choice (4) Response

a.

27

b.

342

c.

512

d.

216

Question number: 11

» Playing With Numbers

MCQ▾

Question

The numbers which are multiplies of 2 are called________.

Choices

Choice (4) Response

a.

Even

b.

Composite

c.

Odd

d.

Prime

Question number: 12

» Playing With Numbers

MCQ▾

Question

The smallest value of ‘x’ in the number 156x0 so that it is divisible by10 is:

Choices

Choice (4) Response

a.

1

b.

2

c.

0

d.

All a. , b. and c. are correct

Question number: 13

» Playing With Numbers

MCQ▾

Question

70060800+109003 is divisible by

Choices

Choice (4) Response

a.

3

b.

11

c.

7

d.

9

Question number: 14

» Playing With Numbers

MCQ▾

Question

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

Choices

Choice (4) Response

a.

42

b.

23

c.

54

d.

36

Question number: 15

» Playing With Numbers

MCQ▾

Question

The reciprocal of the smallest prime is

Choices

Choice (4) Response

a.

1

b.

2

c.

12

d.

0

Question number: 16

» Playing With Numbers

MCQ▾

Question

Which of the following is a perfect square?

Choices

Choice (4) Response

a.

68

b.

56

c.

48

d.

49

Question number: 17

» Playing With Numbers

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)

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