2,15,41,80,?

Answer: Option D

Explanation:

The pattern is + 13, + 26, + 39,.....

So, missing term = 80 + 52 = 132.

6, 11, 21, 36, 56, ?

Answer: Option C

The pattern is + 5, + 10, + 15, + 20, ...

So, missing term = 56 + 25 = 81.

563, 647, 479, 815, ?

The pattern is + 84, - 168, + 336,.....i.e. + 84, - (84 x 2), + (84 x 2^{2}), .....

So, missing term = 815 - (84 x 2^{3}) = 815 - 672 = 143.

13, 35, 57, 79, 911, ?

The terms of the given series are numbers formed by joining together consecutive

odd numbers in order i.e. 1 and 3, 3 and 5, 5 and 7, 7 and 9, 9 and 11, .....

So, missing term = number formed by joining 11 and 13 = 1113.

1, 4, 10, 22, 46, ?

The pattern is + 3, + 6, + 12, + 24,.....

So, missing term = 46 + 48 = 94.