# IMO Level 1- Mathematics Olympiad (SOF) Class 6: Questions 123 - 130 of 1059

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## Question number: 123

Edit
MCQ▾

### Question

Multiplicative identity is________

### Choices

Choice (4) Response

a.

1

b.

2

c.

0

d.

3

## Question number: 124

Edit
MCQ▾

### Question

Which of the following statement is true?

Statement I: Every whole number is a rational number

Statement II: Every integer is a rational number

### Choices

Choice (4) Response

a.

II true

b.

I true,

c.

I and II false

d.

I and II true

## Question number: 125

Edit
MCQ▾

### Question

The number with which 96 is multiplied so that product remains the same is ________

### Choices

Choice (4) Response

a.

1

b.

0

c.

96

d.

## Question number: 126

Edit
MCQ▾

### Question

Multiplicative identity for a rational number is________

### Choices

Choice (4) Response

a.

1

b.

0

c.

2

d.

All of the above

## Question number: 127

Edit
MCQ▾

### Question

If are two whole numbers, then commutative law is applicable to subtraction if and only if

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 128

Edit
MCQ▾

### Question

A number is always divisible by 90 if

### Choices

Choice (4) Response

a.

It is divisible by both 2 and 45

b.

It is divisible by both 5 and 18

c.

It is divisible by both 9 and 10

d.

All a. , b. and c. are correct

## Question number: 129

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MCQ▾

### Question

Which of the following statement is true if N, W and I are sets of Natural, Whole and Integer numbers respectively?

### Choices

Choice (4) Response

a.

I ⊂ W ⊂ N

b.

N ⊂ W ⊂ I

c.

W ⊂ N ⊂ I

d.

I ⊂ N ⊂ W

## Question number: 130

Edit
MCQ▾

### Question

The prime number that is placed at fifth after prime number 7 is

### Choices

Choice (4) Response

a.

27

b.

19

c.

23

d.

29

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