Which number does not belong in the series 2-3-6-7-8-14-15-30?

Answer 1

8 does not belong

Sequence is to add 1 for the first number, and double the next result, and then add 1 to that result, and double again...

Correct Sequence

2 (+1) 3 (x2) 6 (+1) 7 (x2) 14 (+1) 15 (x2) 30
2-3-6-7-8-14-15-30

(2+1) = (3 x 2) = (6 + 1) = (7 x 2) = (14 + 1) = (15 x 2) = 30 ....


So 8 does not belong in the above series.

Answer 2

66

Answer 3

8

Answer 4

8

Answer 5

8

Answer 6

2

Answer 7

8