# IMO Level 1- Mathematics Olympiad (SOF) Class 7: Questions 33 - 39 of 1022

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## Question number: 33

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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.

30 seconds

b.

20 seconds

c.

60 seconds

d.

39 seconds

## Question number: 34

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MCQ▾

### Question

Which of the following statements is true?

### Choices

Choice (4) Response

a.

The product of two rational numbers is a rational number

b.

Zero has no reciprocal

c.

1 and -1 are reciprocal of themselves

d.

All a. , b. and c. are correct

## Question number: 35

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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.

22

b.

36

c.

49

d.

27

## Question number: 36

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MCQ▾

### Question

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

### Choices

Choice (4) Response

a.

b.

c.

5

d.

15

## Question number: 37

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MCQ▾

Simplify

### Choices

Choice (4) Response

a.

8

b.

7

c.

d.

## Question number: 38

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MCQ▾

### Question

A gardener plans to plant 630 trees in 21 rows each containing the same number of trees, then how many trees will there be in each row?

### Choices

Choice (4) Response

a.

3

b.

30

c.

21

d.

300

## Question number: 39

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MCQ▾

### Question

The sign of the product of one positive integer and one negative integer is________.

### Choices

Choice (4) Response

a.

Negative

b.

Positive or Negative

c.

Positive

d.

Cannot be determined