Verbal Reasoning - Mental Ability Questions

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

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
250, 275, 301, ?

In a certain code language, “TRUCKS” is written as “WPXANQ”. How is “MOPERS” written in that code language?

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
C A E, F D H, I G K, ?

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.

XPK, VNJ, TLH, RJE, ?

Kathir is senior of Ganesh. Ganesh is senior of Apparu. Apparu is junior of Raju. Raju is junior of Ganesh. Who is the most senior?

A series is given, with one number missing. Choose the correct alternative from the given ones that will complete the series.
-7.25, -5.75, -4.25, -2.75, ? , 0.25

A series is given, with one term missing. Choose the correct alternative from the given ones that will complete the series:

68, 72, 65, 69, 62, 66, _?__