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Surds and Indices - General Aptitude

Q1:

(256)0.16 x (256)0.09 = ?

A 4

B 16

C 64

D 256.25

ANS:A - 4

(256)0.16 x (256)0.09 = (256)(0.16 + 0.09)    = (256)0.25    = (256)(25/100)    = (256)(1/4)    = (44)(1/4)    = 44(1/4)    = 41    = 4