Select the combination of letters that when sequentially placed in the gaps of the given letters series will complete the series.
b_bab_bc_abbb_ba_b

380, 645, 557, 656, 762, 875, ?

What will come in place of question (?) mark in the following series?
CD     FG     JK     ?        UV

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

In the following question , a series is given with one terms missing . Choose the correct alternative from the given ones that will complete the series :

96, 109, 134, 175, ?

A series is given, with one term missing choose the correct alternative from the given ones that will complete the series.
1, 9, 25, 81, 329,  ? 

From the given options, select the shape which will come at the next position in the following series.

A letter series is given below in which some letter are missing. Select the  option that gives the letters that can fill these blanks in that order.
a_ca_bab_ad_abc_db