Verbal Reasoning - Mental Ability Questions

Select the missing number from the given options?

Select the missing number from the given responses.

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.
1, 7, 42, 210, 840, ?

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

DFI, JNS, TZG, ?

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

RMT, PKR, NIP, ?, JEL

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

TAP, WDS, ZGV, ?, FMB

Select the missing number from the given alternatives?

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

BKP, EMQ, IPS, NTV, ?