624, 570, 530, 502, ?, 474

Find out the missing number in the following number series.

Q. 624, 570, 530, 502, ?, 474

A.474

B.478

C.484

D.492

E.496

Sol:

624 – 8² + 10 = 570

570 – 7² + 09 = 530

530 – 6² + 8 = 502

502 – 5² + 7 = 484

484 – 4² + 6 = 474