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Surds and Indices - General Aptitude

Q1:

(17)3.5 x (17)? = 178

A 2.29

B 2.75

C 4.25

D 4.5

ANS:D - 4.5

Let (17)3.5 x (17)x = 178. Then, (17)3.5 + x = 178.  3.5 + x = 8  x = (8 - 3.5)  x = 4.5