What will replace "?" in the following alphanumeric series?
C2X, G3T, K5P, O7L, ?, W13D
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → S11H
In a letter-number series, each part of the term follows its own rule, so the first letters, the numbers and the last letters are checked separately.
First letters C (3), G (7), K (11), O (15):
Each is 4 places ahead
So the next is S (19), and then W (23) as given
Numbers 2, 3, 5, 7:
Prime numbers in order
So the next is 11, and then 13 as given
Last letters X (24), T (20), P (16), L (12):
Each is 4 places back
So the next is H (8), and then D (4) as given