What should come in the place of question mark (?) in the following alpha numeric series?

Z9A, X7D, ?, T3J, RIM

Answer: Option D

Explanation:

Pattern of the series as shown below

Hence, the missing term is V5G.

Q1F, S2E, U6D, W24C, ?

Answer: Option A

Hence, the missing term is IQ24.

9Z-20, 11A-18, 13Y-16, 15B-14, ?

Answer: Option C

Hence, the missing term is 17X12.

8 H 24 X 7 G 15 O 17 ?

Here, the numbers are followed by letters at that particular place in English alphabet.

Hence, the missing term is Q.

B 2 I 9 R 18 T 20 H ?

Hence, the letters are followed by numbers, which denotes is positional value in English alphabet.

Hence, the missing term is 8.