2,2,5, 13,28,?

Answer: Option D

Explanation:

The pattern is + 0, + 3, + 8, + 15, ..... i.e. + (l^{2} - 1), + (2^{2} - 1), + (3^{2} - 1), + (4^{2} - 1), .....

So, missing term = 28 + (5^{2} - 1) = 28 + 24 = 52.

0, 2, 8, 14, ?, 34

Answer: Option C

The pattern is + 2, + 6, + 6, + 10, + 10,.....

So, missing term = 14 + 10 = 24.

1, 5, 14, 30, 55, 91, ?

Answer: Option B

The pattern is + 4, + 9, + 16, + 25, + 36, ..... i.e. + 2^{2}, + 3^{2}, + 4^{2}, + 5^{2}, + 6^{2},.....

So, missing term = 91 + 7^{2} = 91 + 49 = 140.

In the series 10, 17, 24, 31, 38,.....which of the following will be a number of the series ?

The given series consists of numbers each of which, on dividing by 7, leaves a

remainder 3. No other number except 346 satisfies the property.

240, ?, 120, 40, 10, 2

The pattern is ÷ 1, ÷ 2, ÷ 3, ÷ 4, ÷ 5.

So, missing term = 240 ÷ 1 = 240.