31. If a and b are positive integers, then
HCF(a,b) x LCM (a,b) =
a) a x b b)
a + b c) a – b d)
a/b
32. π is –
a)
a natural number b)
not a real number
c)
a rational number d)
an irrational number
33. The missing
number in the factor tree is-
a) 4 b)
5 c) 6 d)
8
34. 91/625
, when written in decimal form terminates; as
the factor of denominator are in the form of 2m x 5n.
This number will terminate after how many digits?
a)
1 b) 2 c) 3 d) 4
35.
Decimal representation of rational number 8/27 is –
a)
0.
b) 0.29
c) 0.2
d) none of these
36. The HCF and LCM of two numbers are 4
and 9696, then the product of two numbers is –
a)
9696 b) 24242 c)38784 d) 4848
37. A number p/q when expressed in decimal
form terminates after 7 digits then factor of q are of the form of xm
× yn; the value of x + y should be –
a)
7 b)
14 c) 9 d) 26
38. The HCF of two numbers is 8, which one
of the following can never be their LCM
a)
24 b) 48 c) 56 d)
60
39. The LCM of two co-prime number is 638.
One number is 29, find the other number
a)
16 b) 22 c) 36 d) 17
40. IF A, B and C are three numbers such
that LCM of A and B is B and the LCM of B and C is C then LCM of A, B and C is
a)
A b) B c)
C d)
NB :- Answer is marked with red
DR RAJESH KUMAR THAKUR
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