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

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## Question 148

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