Question

Find the wrong number in the given number series?
5, 8, 40, 90, 664

A) 8 B) 40 C) 90 D) 664

Answer 1

Answer:

Option: B

The given number series is 5, 8, 40, 90, 664

5

5 - 1 x 2 = 8

8 - 3 x 4 = 20 (NOT 40)

20 - 5 x 6 = 90

90 - 7 x 8 = 664

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