# IMO- Mathematics Olympiad Class 6: Questions 155 - 162 of 1049

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## Question number: 155

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: 156

MCQ▾

### Question

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

### Choices

Choice (4) Response

a.

Negative

b.

Positive

c.

0

d.

None of the above

## Question number: 157

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: 158

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: 159

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: 160

MCQ▾

is divisible by

### Choices

Choice (4) Response

a.

2

b.

3

c.

9

d.

10

## Question number: 161

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

## Question number: 162

MCQ▾

### Question

The LCM of two numbers is 138. If one of the numbers is 46 and another is 69, then the HCF is

### Choices

Choice (4) Response

a.

23

b.

13

c.

28

d.

29

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