IMO Level 1- Mathematics Olympiad (SOF) Class 7: Questions 72 - 78 of 1022

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Question number: 72

» Number System

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MCQ▾

Question

Which of the following statement is true?

Choices

Choice (4) Response

a.

For all non-zero integers a and b, is always greater than either a or b

b.

The product of two negative integers is positive

c.

The product of a negative and a positive integer may be zero

d.

All of the above

Question number: 73

» Number System

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Question

Simplify

Choices

Choice (4) Response

a.

89

b.

90

c.

87

d.

88

Question number: 74

» Number System

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Question

The difference of the sum of even numbers and sum of odd numbers between 10 and 20 is________.

Choices

Choice (4) Response

a.

13

b.

14

c.

15

d.

16

Question number: 75

» Number System

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Question

A rational number

Choices

Choice (4) Response

a.

It is not possible to represent on the number line

b.

Lies to the left side of 0 on the number line

c.

Lies to the right side of 0 on the number line

d.

Cannot be determined on which side the number lies

Question number: 76

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Question

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

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 77

» Number System

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Question

What will be the sign of the product if we together multiply 101 negative integers and 11 positive integers?

Choices

Choice (4) Response

a.

Positive

b.

Negative

c.

Data is insufficient

d.

Can’t say

Question number: 78

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Question

The difference of the sum of even numbers and sum of odd numbers between 20 and 30 is________.

Choices

Choice (4) Response

a.

24

b.

13

c.

26

d.

25