Character Puzzles - Verbal and Reasoning

Q1:

Which one will replace the question mark ?

A 9

B 5

C 7

D 3

ANS:A - 9

Explanation: 5 x 8 x 10 = 400 and 6 x 9 x 7 = 378 Therefore 5 x 7 x ? = 315 ? = 9.