49 × 49 × 49 × 49 = 7?

A 4

B 7

C 8

D 16

Solution

Correct Answer: Option C

49 × 49 × 49 × 49 
=  72 × 72 × 72 × 72 
= 72 + 2 + 2 + 2 
= 78 

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