IMO Level 1- Mathematics Olympiad (SOF) Class 6: Questions 148 - 156 of 1059

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Question 148

Question

MCQ▾

is divisible by

Choices

Choice (4)Response

a.

7

b.

9

c.

11

d.

3

Question 149

Question

MCQ▾

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 150

Question

MCQ▾

The reciprocal of the smallest prime is

Choices

Choice (4)Response

a.

0

b.

2

c.

1

d.

Question 151

Question

MCQ▾

Which of the following is a perfect square?

Choices

Choice (4)Response

a.

49

b.

68

c.

56

d.

48

Question 152

Question

MCQ▾

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 153

Question

MCQ▾

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

Question 154

Question

MCQ▾

Prime factorization of 5775 is

Choices

Choice (4)Response

a.

b.

c.

d.

Question 155

Question

MCQ▾

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.

Question does not provide sufficient data or is vague

Question 156

Question

MCQ▾

Multiplying three negative integers with a positive integer gives a ________ result.

Choices

Choice (4)Response

a.

Positive

b.

0

c.

Negative

d.

None of the above