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

In this 21^{st} century, Multiple Choice Questions (MCQs) play a vital role to prepare for a competitive examination. CBSE board has also brought a major change in its board exam patterns. Now-a-days, a total of 10 MCQs questions are asked in the class 10 board examination.

In most of the competitive examinations, only MCQ questions are asked. So, for getting ready for the competitive examinations, we have to practice for MCQs questions to solve. It strengthens the critical thinking and problem solving skills.

In future, if you want to prepare for competitive examination and to crack it, then you should more focus on the MCQ questions. Thus, from the board examinations point of view and competitive examinations point of view, you should practice more on multiple choice questions.

Thus, let’s solve these MCQs Questions to make our foundation very strong.

**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**