IMO- Mathematics Olympiad (SOF) Class 7: Questions 70 - 75 of 1012

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Question number: 70

» Number System

Assertion-Reason▾

Assertion (Ꭺ)

Rational numbers are always closed under division by only non-zero rational numbers

Reason (Ꭱ)

Division by zero is not defined for any rational numbers

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

b.

Ꭺ is false but Ꭱ is true

c.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

d.

Ꭺ is true but Ꭱ is false

Question number: 71

» Number System

MCQ▾

Question

Which of the following statement is true?

Choices

Choice (4) Response

a.

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

b.

The product of a positive and a negative integer is negative

c.

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

d.

None of the above

Question number: 72

» Number System

MCQ▾

Question

Which of the following statement is true?

Choices

Choice (4) Response

a.

The product of two negative integers is positive

b.

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

c.

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

d.

None of the above

Question number: 73

» Number System

MCQ▾

Question

Simplify

Choices

Choice (4) Response

a.

89

b.

88

c.

87

d.

90

Question number: 74

» Number System

MCQ▾

Question

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

Choices

Choice (4) Response

a.

14

b.

15

c.

13

d.

16

Question number: 75

» Number System

MCQ▾

Question

A rational number

Choices

Choice (4) Response

a.

Cannot be determined on which side the number lies

b.

It is not possible to represent on the number line

c.

Lies to the left side of 0 on the number line

d.

Lies to the right side of 0 on the number line

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