# Number System (IMO- Mathematics Olympiad Class 7): Questions 32 - 37 of 81

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## Question number: 32

» Number System

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.

## Question number: 33

» Number System

MCQ▾

### Question

An insect crawls up 7 cm every second on an 80 cm vertical rod and then falls down 3 cm over the next second. How many seconds will it take to climb the rod?

### Choices

Choice (4) Response

a.

39 seconds

b.

30 seconds

c.

20 seconds

d.

60 seconds

## Question number: 34

» Number System

MCQ▾

### Question

Which of the following statements is true?

### Choices

Choice (4) Response

a.

Zero has no reciprocal

b.

1 and -1 are reciprocal of themselves

c.

The product of two rational numbers is a rational number

d.

All a. , b. and c. are correct

## Question number: 35

» Number System

MCQ▾

### Question

The product of two rational numbers is. If one of the numbers is , then the other number is________.

### Choices

Choice (4) Response

a.

27

b.

36

c.

22

d.

49

## Question number: 36

» Number System

MCQ▾

### Question

The value of y such that and are equivalent rational numbers is________.

### Choices

Choice (4) Response

a.

b.

c.

15

d.

5

## Question number: 37

» Number System

MCQ▾

Simplify

### Choices

Choice (4) Response

a.

b.

7

c.

d.

8

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