Square Root and Cube Root - General Aptitude

What should come in place of both x in the equation x = 162 .

128 x

A 12

B 14

C 144

D 196

ANS:A - 12

Let	x	=	162
	128		x

Then x² = 128 x 162 = 64 x 2 x 18 x 9 = 8² x 6² x 3² = 8 x 6 x 3 = 144.

x = 144 = 12.

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