# IMO Level 1- Mathematics Olympiad (SOF) Class 6: Questions 149 - 157 of 1059

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## Question number: 149

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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: 150

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MCQ▾

### Question

The reciprocal of the smallest prime is

### Choices

Choice (4)Response

a.

0

b.

2

c.

1

d.

## Question number: 151

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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: 152

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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: 153

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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.

81

b.

51

c.

85

d.

31

## Question number: 154

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MCQ▾

### Question

Prime factorization of 5775 is

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 155

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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.

Question does not provide sufficient data or is vague

## Question number: 156

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MCQ▾

### Question

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

## Question number: 157

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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.

23

b.

15

c.

17

d.

20

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