# IMO Level 1- Mathematics Olympiad (SOF) Class 7: Questions 28 - 32 of 1022

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## Question number: 28

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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.

491 liters

b.

400 liters

c.

410 liters

d.

90 liters

## Question number: 29

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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 1 and 2 are correct

b.

Only 3 is correct

c.

Only 2 and 3 are correct

d.

Question does not provide sufficient data or is vague

## Question number: 30

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MCQ▾

### Question

Which of the following statements is true?

### Choices

Choice (4) Response

a.

is a rational number

b.

Irrational number is not written in ration form

c.

2 is a prime number

d.

All a. , b. and c. are correct

## Question number: 31

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MCQ▾

### Question

Which of the following number sentence below best describes the problem shown on the number line? A Number Line is Given Find out the number sentence that describes the problem given on the number line

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 32

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MCQ▾

### Question

In a magic square each row, column and diagonal have the same sum, then the values of A and B are respectively________.

 1 -10 0 A -3 -2 -6 4 B

### Choices

Choice (4) Response

a.

b.

c.

d.