# IMO- Mathematics Olympiad Class 7: Questions 15 - 19 of 1012

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## Question number: 15

MCQ▾

### Question

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

 6 -1 4 A 3 5 2 7 B

### Choices

Choice (4) Response

a.

b.

0, 0

c.

1, 1

d.

## Question number: 16

MCQ▾

### Question

If p: When a positive integer and a negative integer are added we always get a positive integer.

q: When two positive integers are added, we get a positive integer, then

### Choices

Choice (4) Response

a.

P and q are false

b.

P is true and q is false

c.

P and q are true

d.

P is false and q is true

## Question number: 17

MCQ▾

### Question

Which of the following number is not prime?

### Choices

Choice (4) Response

a.

4

b.

3

c.

2

d.

5

## Question number: 18

MCQ▾

### Question

A tank contains 1000 liters of water. Due to a small hole in the tank, the quantity of water is decreasing at the rate of 10 liters every hour. What will be the quantity of the water in the tank after 20 hours?

### Choices

Choice (4) Response

a.

210 liters

b.

900 liters

c.

800 liters

d.

490 liters

## Question number: 19

MCQ▾

### Question

If P: When two negative integers are added we always get a negative integer.

q: When two positive integers are added, we get a positive integer, then

### Choices

Choice (4) Response

a.

P is false and q is true

b.

P and q are false

c.

P and q are true

d.

P is true and q is false

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