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Square Root and Cube Root - General Aptitude

Q1:

The cube root of .000216 is:

A .6

B .06

C 77

D 87

ANS:B - .06

(.000216)1/3 = 216 1/3
106
   = 6 x 6 x 6 1/3
102 x 102 x 102
   = 6
102
   = 6
100
   = 0.06