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Surds and Indices Aptitude Test Paper 1
1) The value of 51/4 x (125)0.25 is
- 5
- 5
- 25
Answer: C
Explanation:
51/4 x (125)0.25
51/4 × (53 )1/4= 5 
=5
2) Value of (256)0.16 x (256)0.09 is
- 64
- 4
- 8
- 16
Answer: B
Explanation:
(256)0.16 x (256)0.09
(256)0.16+0.09 = (256)0.25 = (256)1/4
= (44)1/4 = 44 x 1/4 = 4
3) If 42x = 
, then x is
- 5/4
- 4/5
- 3/5
- None of these
Answer: D
Explanation:
42x =
(22x)2 = 
24x=
24x = 2-5
Since the base are same
4x= -5
x = 
4) 
+ 2-3 is equal to
- 2n+1
- -2n+1 +
- – 2n
- 1
– 2n
Answer: D
Explanation:
+ 2-3
5) 
is equal to
- –
- –
Answer: A
Explanation:
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