**MCQs Questions for Class 9 Maths Chapter 1 Number System**

In this 21^{st} century, Multiple Choice Questions (MCQs) play an important role to prepare for a competitive examination. Now-a-days, MCQs questions are asked in CBSE board examinations as well. In most of the competitive examinations, only MCQ Questions are asked.

In future, if you want to prepare for competitive examination, then you should focus on the MCQs questions. Thus, let’s solve these MCQs questions to make our foundation strong.

In this post, you will find **18** **MCQs questions for class 9 maths chapter 1 number system**.

**MCQs Questions for Class 9
Maths Chapter 1 Number System**

**1.** In
between two rational numbers, there is/are:

(a)
Exactly one rational number

(b)
Infinitely many rational number

(c)
Many irrational numbers

(d) Only irrational numbers

**Answer:
b**

**2. ****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**

**3. **When 15√15 is
divided by 3√3, what is the quotient?

(a) 5√3

(b) 3√5

(c) 5√5

(d) 3√3

**Answer:
c**

**4.** The
product of a rational and an irrational number is:

(a)
Always an integer

(b)
Always a rational number

(c)
Always an irrational number

(d) Sometimes rational and sometimes irrational

**Answer:
c**

**5.**** 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**

**6. **The decimal expansion of √2
is

(Ð°) finite decimal

(b) 1.4121

(c) non-terminating recurring

(d) non-terminating non-recurring

**Answer:
d**

**7.** The
decimal expansion of an irrational number may be:

(a)
Terminating

(b)
Recurring

(c)
Either terminating or non- terminating

(d) Non-terminating and non-recurring

**Answer:
d**

**8.**** Every rational number is:****
**(a) Whole number

(b) Natural number

(c) Integer

(d) Real number

**9.** A
rational number between √2 and √3:

(a)
1.9

(b)
(√2. √3)/2

(c)
1.5

(d) 1.8

**Answer:
c**

**10. **(√a + √b) (√a – √b) is

(a) a + b

(b) a – b

(c) 2√a

(d) 2√b

**Answer:
b**

**11.** 4√5
+ 5√5 is equal to:

(a)
9√5

(b)
9√10

(c)
5√10

(d) 7√5

**Answer:
a**

**12.****
Which of the following is an irrational number?****
**(a) √16

(b) √(12/3)

(c) √12

(d) √100

**Answer: c**

**13.**√12
× √15 is equal to:

(a)
5√6

(b)
6√5

(c)
10√5

(d) √25

**Answer:
b**

**14.**** √6 **×** √27
is equal to:****
**(a) 9√2

(b) 3√3

(c) 2√2

(d) 9√3

**Answer:
a**

**15.** What
would be the denominator after rationalizing 7/(5√3 - 5√2)?

(a)
19

(b)
20

(c)
25

(d) None of these

**Answer:
d**

**16.****
Which of the following is equal to x ^{3}?**

**(a) x**

^{6}-x

^{3}

(b) x

^{6}.x

^{3}

(c) x

^{6}/x

^{3}

(d) (x

^{6})

^{3}

**Answer:
c**

**17. **If x^{1/12} = 49^{1/24},
then find the value of x.

(a) 49

(b) 2

(c) 12

(d) 7

**Answer:
d**

**18.** The decimal expansion
of an irrational number may be:

(a) Terminating

(b) Recurring

(c) Either terminating or non-terminating

(d) Non-terminating and non-recurring

**Answer:
d**