Integers, Fractions and Decimals

Short Answer Questions(SAQs)

What is closure property?

Closure property of whole numbers under addition: The sum of any two whole numbers will always be a whole number, i.e. if a and b are any two whole numbers, a + b will be a whole number.

What are the properties of zero?

• Zero is even
• Zero is neither positive nor negative
• Zero is an integer

What is the definition of inverse?

A term is said to be in inverse proportion to another term if it increases (or decreases) as the other decreases (or increases). Of or relating to an inverse function.

What is a decimal?

A decimal is a 110 written in a special form.

What is a decimal fraction?

In algebra, a decimal fraction is a fraction whose denominator is 10 or a multiple of 10 like 100, 1,000, 10,000, etc.

What does reciprocal mean?

In Mathematics, reciprocal means an expression which when multiplied by another expression, gives one (1) as the result.

MCQs

1. Which of the following is a whole number?

(a) −3

(b) 0

(c) 1.5

(d) −1

► (b) 0

2. What is 35 + 25?

(a) 45

(b) 1

(c) 57

(d) 12

► (b) 1

3. Which of the following is a rational number?

(a) 56

(b) √3

(c) π

(d) e

► (a) 56

4. √81 is equal to:

(a) 7

(b) 8

(c) 9

(d) 10

► (c) 9

5. What is 47 − 27?

(a) 67

(b) 27

(c) 17

(d) 0

► (b) 27

6. What is the reciprocal of 2?

(a) 2

(b) −2

(c) 12

(d) 0

► (c) 12

7. Which number is neither positive nor negative?

(a) 0

(b) 1

(c) −1

(d) 10

► (a) 0

8. Which of these is not a whole number?

(a) 5

(b) 9

(c) 34

(d) 0

► (c) 34

9. √16 is:

(a) 5

(b) 2

(c) 3

(d) 4

► (d) 4

10. Which of the following is a terminating decimal?

(a) 13

(b) 14

(c) π

(d) 0.666…

► (b) 14

11. What is √25?

(a) 3

(b) 5

(c) 4

(d) 6

► (b) 5

12. Which number is an integer but not a whole number?

(a) 0

(b) −5

(c) 4

(d) 10

► (b) −5

13. Which of these is a non-terminating decimal?

(a) 0.5

(b) 18

(c) π

(d) 1.25

► (c) π

14. The sum of two whole numbers is always a:

(a) Natural number

(b) Rational number

(c) Whole number

(d) Decimal

► (c) Whole number

15. What is 58 × 2?

(a) 54

(b) 108

(c) 12

(d) 1.25

► (b) 108

16. Which is a mixed number?

(a) 4

(b) 2.75

(c) 1 12

(d) 0.5

► (c) 1 12

17. What is the additive identity in integers?

(a) −1

(b) 1

(c) 0

(d) 10

► (c) 0

18. Which of the following represents a negative rational number?

(a) −47

(b) 47

(c) −2.5

(d) Both (a) and (c)

► (d) Both (a) and (c)