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Surds and Indices - General Aptitude

Q1:

(0.04)-1.5 = ?

A 25

B 125

C 250

D 625

ANS:B - 125

(0.04)-1.5 = 4 -1.5
100
   = 1 -(3/2)
25
   = (25)(3/2)    = (52)(3/2)    = (5)2 x (3/2)    = 53    = 125.