CBSE Class 9 Mathematics Number System Worksheet Set A
- Number System
1.) Can we write 0 in the form of p/q?
a. Yes
b. No
c. Cannot be explained
d. None of the above
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
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
4.) Every rational number is:
a. Whole number
b. Natural number
c. Integer
d. Real number
5.) √9 is __________ number.
a. A rational
b. An irrational
c. Neither rational nor irrational
d. None of the above
6.) Which of the following is an irrational number?
a. √16
b. √(12/3)
c. √12
d. √100
7.) 3√6 + 4√6 is equal to:
a. 6√6
b. 7√6
c. 4√12
d. 7√12
8.) √6 x √27 is equal to:
a. 9√2
b. 3√3
c. 2√2
d. 9√3
9.) Which of the following is equal to x3?
a. x6 – x3
b. x6.x3
c. x6/x3
d. (x6)3
10.) Which of the following is an irrational number?
a. √23
b. √225
c. 0.3796
d. 7.478478
11.) Which of the following is an irrational number?
a. 0.14
b. 0.14¯¯¯¯¯¯160.1416¯
c. 0.¯¯¯¯¯¯¯¯¯¯¯14160.1416¯
d. 0.4014001400014…
12.) 2√3+√3 =
a. 6
b. 2√6
c. 3√3
d. 4√6
13.) Find the value of √√2−1√2+12−12+1, if √2 = 1.4142.
a. 5.8282
b. 0.1718
c. 0.4142
d. 2.4142
14.) The number obtained on rationalising the denominator of 1√7−217−2 is
a. (√7+2)/3
b. (√7-2)/3
c. (√7+2)/5
d. (√7+2)/45
15.) Which of the following is rational?
a. 4/0
b. 0/4
c. √3
d. π
16.) The irrational number between 2 and 2.5 is
a. √11
b. √5
c. √22.5
d. √12.5
17.) The value of √10 times √15 is equal to
a. 5√6
b. √25
c. 10√5
d. √5
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
19.) Which of the following is a rational number?
a. 0
b. 2√3
c. 2+√3
d. π
20.) Which of the following is an irrational number?
a. √(4/9)
b. √12/√3
c. √7
d. √81
21). In between two rational number there is/are:
a) Exactly one rational number
b) Infinitely many rational number
c) Many irrational numbers
d) Only irrational numbers
22). The product of a rational and an irrational numbers is:
a) Always an integer
b) Always a rational number
c) Always an irrational number
d) Sometimes rational and sometimes irrational
23). 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
24) A rational number between √2 and √3:
a) 1.9
b) (√2. √3)/2
c) 1.5
d) 1.8
25) A rational number between √2 and √3:
a) 1.9
b) (√2. √3)/2
c) 1.5
d) 1.8
26) 4√5 + 5√5 is equal to:
a) 9√5
b) 9√10
c) 5√10
d) 7√5
27). Which of the following is irrational?
a) 0.4014001400014…
b) 0.14
28) √12 X √15 is equal to:
a) 5√6
b) 6√5
c) 10√5
d) √25
29) Which of the following is equal to x2?
a) 1/4
b) 1/2
c) 4
d) 1/16
32) What would be the denominator after rationalizing 7/(5√3 - 5√2)?
a) 19
b) 20
c) 25
d) None of these
a) 2.732
b) 0.2679
c) 0.732
d) 0.517
35). Value of (256)0.16 X (256)0.09 is:
a) 4
b) 16
c) 64
d) 256.25
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