In this question, a sequence is given, with one term missing. Choose the correct alternative from the given ones that will complete the series.
NOA , PQB , RSC ?

Which set of letters when sequentially placed at the gaps in the given letter series shall complete it?
AB_AB_AA_BB_

Select the option that will fill in the blank and complete the given series.
14, 17, 23, 32, 44 , ___

What value will come in place of question mark (?) in the number – series given below?

14 149 257 338 392 ? 

5, 7.5, 12.5, 22.5, ?

Identify the number that does NOT belong to the following series.
47, 51, 57, 65, 69, 76, 83 

2, 65, 7, 59, 12, 53, ?, ?

Identify the number that does NOT related to the following series.
25, 28, 23, 30, 21, 33