Which of the following letter-number-clusters will replace the question mark (?) in the given series to make it logically complete?
VRO 6, UQN 11, TPM 16, SOL 21, ?​

Which of the given letter-number clusters will replace the question mark (?) in the following series to make it logically complete?
IHD 78, EDZ 87, AZV 96, WVR 105, ?

Which of the following letter-number clusters will replace the question mark (?) in the given series to make it logically complete?
PGE 18, TEI 26, XCM 34, BAQ 42, ?

A letter–number series with few terms missing is given below. Choose the missing terms from the given alternatives.
Z A 25, W _ 20, T G _ ,  _ J 10, N _ 5

In the series B2, F3, J5, N7, R11, ?, _______, the term in place of question mark is:

Which of the following letter-number-clusters will replace the question mark (?) in the given series to make it logically complete?
CJL 11, DKM 15, ELN 19, FMO 23, ?​

Which of the following letter-number clusters will replace the question mark (?) in the given series to make it logically complete?
NQ31, MP40, LO49, KN58, ?

Which of the following letter-number clusters will replace the question mark (?) in the given series to make it logically complete?
AAA 5, BCD 10, CEG 15, DGJ 20, ?​