1.If the HCF of 65 and 117 is expressible in the form 65m – 117, then the value of ‘m’ is
a) 3
b) 1
c) 4
d) 2

2. Which of the following is false:
a) H.C.F.(a,b) × L.C.M.(a,b)=a×b
b) H.C.F.(p,q,r) × L.C.M.(p,q,r)=p×q×r
c) H.C.F.(p,q,r) = 1; if p,q,r are prime numbers
d) L.C.M.(p,q,r) = p×q×r; if p,q,r are prime numbers

3. The LCM of x and 18 is 36. The HCF of x and 18 is 2. What is the number x?
a) 3
b) 4
c) 1
d) 2

4. Which of the following is not a rational number?
a) √16
b) √8
c) √9
d) √25

5. 0.515115111511115…………. is
a) an irrational number
b) a prime number
c) a rational number
d) an integer

6. The decimal expansion of 21242124 will terminate after
a) None of these
b) 1 decimal place
c) 2 decimal places
d) 3 decimal places

7. If 9x+2 = 240 + 9x, then the value of ‘x’ is
a) 0.3
b) 0.2
c) 0.1
d) 0.5

8. The multiplicative inverse of zero
a) does not exist
a) is 1/0
c) is 1
d) is 0

9. Every prime number has exactly _______ factors
a) 4
b) 2
c) 3
d) more than 4

10. The exponent of 3 in the prime factorization of 864 is:
a) 4
b) 2
c) 8
d) 3

Real Number Chapter - 1 Quiz 3 Class 10th

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