Playing With Numbers (IMO- Mathematics Olympiad Class 6): Questions 18 - 25 of 86

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Question number: 18

» Playing With Numbers

MCQ▾

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.

31

b.

85

c.

51

d.

81

Question number: 19

» Playing With Numbers

MCQ▾

Question

Prime factorization of 5775 is

Choices

Choice (4) Response
a.

5×5×5×7×11

b.

5×7×7×13

c.

5×5×3×7×11

d.

5×3×7×11

Question number: 20

» Playing With Numbers

MCQ▾

Question

The numbers which have only two factors (1 and the number itself) are called as

Choices

Choice (4) Response
a.

Prime

b.

Composite

c.

Even

d. All of the above

Question number: 21

» Playing With Numbers

MCQ▾

Question

There are 153 apples and 119 oranges. These fruits are to be arranged in heaps containing the same number of fruits. Then the greatest number of fruits possible in each heap is

Choices

Choice (4) Response
a.

20

b.

15

c.

23

d.

17

Question number: 22

» Playing With Numbers

MCQ▾

Question

Number of prime numbers from 1 to 50 are

Choices

Choice (4) Response
a.

12

b.

18

c.

15

d.

20

Question number: 23

» Playing With Numbers

MCQ▾

Question

The HCF and LCM of two numbers is 16 and 192 respectively. If one of the numbers is 64, the other one is

Choices

Choice (4) Response
a.

45

b.

24

c.

72

d.

48

Question number: 24

» Playing With Numbers

MCQ▾

Question

197620+43912 is divisible by

Choices

Choice (4) Response
a.

2

b.

3

c.

9

d.

10

Question number: 25

» Playing With Numbers

MCQ▾

Question

The HCF two numbers is 18. If one of the numbers is 90 and another is 36, then their LCM is

Choices

Choice (4) Response
a.

180

b.

165

c.

170

d.

155

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