Find the missing number:
2, 5, 10, 17, 26 ,?

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.
AZ, BY, CX, ?

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

In the following question, which one set of letters when sequentially placed at the gaps in the given letter series shall complete it?
_q_rpq_r_qq_

Which letter will come in place of the question mark (?) in the following series?
FLO, H?Q, JPS, LRU

Choose the number from the options given below that will replace the question mark in the following series.
423 , 407, 439 , 391, 455, ?

Complete the following number series.
10 , 17, 26, 37, ____

Complete the following number series.
6, 10, 18, 34 ?