What comes in place of the question mark in the following series?
H3M, I5N, L7O, Q9P, ?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → X11Q
Each term has three parts, and each part follows its own rule:
First letter: H, I, L, Q are letters 8, 9, 12, 17; the gaps are +1, +3, +5, so the next gap is +7: 17 + 7 = 24, X
Number: 3, 5, 7, 9 go up by 2, so next is 11
Last letter: M, N, O, P go up by one letter, so next is Q