# Number System (IMO- Mathematics Olympiad Class 7): Questions 25 - 31 of 81

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## Question number: 25

» Number System

MCQ▾

### Question

Which integer is the additive inverse of itself?

### Choices

Choice (4) Response

a.

0

b.

2

c.

3

d.

1

## Question number: 26

» Number System

MCQ▾

### Question

The value of, where is absolute value of an integer is________.

### Choices

Choice (4) Response

a.

1

b.

2

c.

0

d.

3

## Question number: 27

» Number System

MCQ▾

### Question

Which pair of numbers does not have a product equal to 45?

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 28

» Number System

MCQ▾

### Question

A tank contains 500 liters of water. Due to a small hole in the tank, the quantity of water is decreasing at the rate of 9 liters every hour. What will be the quantity of the water in the tank after 10 hours?

### Choices

Choice (4) Response

a.

410 liters

b.

90 liters

c.

491 liters

d.

400 liters

## Question number: 29

» Number System

MCQ▾

### Question

For any two rational numbers x and y which of the following are correct, if x is positive and y is negative?

1. X < Y 2. X = Y 3. X > Y

### Choices

Choice (4) Response

a.

Only 3 is correct

b.

Only 1 and 2 are correct

c.

Only 2 and 3 are correct

d.

All of the above

## Question number: 30

» Number System

MCQ▾

### Question

Which of the following statements is true?

### Choices

Choice (4) Response

a.

Irrational number is not written in ration form

b.

2 is a prime number

c.

is a rational number

d.

All a. , b. and c. are correct

## Question number: 31

» Number System

MCQ▾

### Question

Which of the following number sentence below best describes the problem shown on the number line?

### Choices

Choice (4) Response

a.

b.

c.

d.

f Page