CBSE Class 9 Maths Chapter 1 Number System MCQs

Class 9 Maths Chapter 1 Number System MCQs are available here with solutions.

1.) Can we write 0 in the form of p/q?

a. Yes

b. No

c. Cannot be explained

d. None of the above

Answer: a

2.) The three rational numbers between 3 and 4 are:

a. 5/2, 6/2, 7/2

b. 13/4, 14/4, 15/4

c. 12/7, 13/7, 14/7

d.11/4, 12/4, 13/4

Answer: b

3.) In between any two numbers, there are:

a. Only one rational number

b. Two rational numbers

c. Infinite rational numbers

d. No rational number

Answer: c

4.) Every rational number is:

a. Whole number

b. Natural number

c. Integer

d. Real number

Answer: d

5.) √9 is __________ number.

a. A rational

b. An irrational

c. Neither rational nor irrational

d. None of the above

Answer: a

6.) Which of the following is an irrational number?

a. √16

b. √(12/3)

c. √12

d. √100

Answer: c

7.) 3√6 + 4√6 is equal to:

a. 6√6

b. 7√6

c. 4√12

d. 7√12

Answer: b

8.) √6 x √27 is equal to:

a. 9√2

b. 3√3

c. 2√2

d. 9√3

Answer: a

9.) Which of the following is equal to x³?

a. x⁶ – x³

b. x⁶.x³

c. x⁶/x³

d. (x⁶)³

Answer: c

10.) Which of the following is an irrational number?

a. √23

b. √225

c. 0.3796

d. 7.478478

Answer: a

11.) Which of the following is an irrational number?

a. 0.14

b. 0.14161616...

c. 0.14161416...

d. 0.4014001400014…

Answer: d

12.) 2√3+√3 = 

a. 6

b. 2√6

c. 3√3

d. 4√6

Answer: c

14.) The number obtained on rationalising the denominator of 1/ (√7 – 2) is

a. (√7+2)/3

b. (√7-2)/3

c. (√7+2)/5

d. (√7+2)/45

Answer: a

15.) Which of the following is rational?

a. 4/0

b. 0/4

c. √3

d. π

Answer: b

16.) The irrational number between 2 and 2.5 is 

a. √11

b. √5

c. √22.5

d. √12.5

Answer: b

17.) The value of √10 times √15 is equal to

a. 5√6

b. √25

c. 10√5

d. √5

Answer: a

18.) The decimal representation of the rational number is

a. Always terminating

b. Either terminating or repeating

c. Either terminating or non-repeating

d. Neither terminating nor repeating

Answer: b

19.) Which of the following is a rational number?

a. 0

b. 2√3

c. 2+√3

d. π

Answer: a

20.) Which of the following is an irrational number?

a. √(4/9)

b. √12/√3

c. √7

d. √81

Answer: c