A, D, G, J, ? — Number & Letter Series Aptitude Question
A, D, G, J, ?: Find the next letter: A, D, G, J, ? Answer and worked solution on CodeKairo.
- Topic: Number & Letter Series
- Section: Logical Reasoning
- Difficulty: Easy
- Time target: 40 seconds
Question
Find the next letter:
A, D, G, J, ?
Options
- L
- M
- N
- K
Show the answer and the worked solution
Correct answer: B. M
Worked solution
- Positions: A = 1, D = 4, G = 7, J = 10 — each +3.
- Next = 13 = M.
Answer: M.
The idea
Turn letters into numbers (A = 1 … Z = 26), find the numeric rule, then convert back. Knowing the landmarks A=1, E=5, J=10, O=15, T=20, Y=25 makes this instant.
Shortcut. Skip two letters each time: after J drop K and L, landing on M.
Common trap. "L" — skipping only one letter after J; the series skips two each time (B, C after A; E, F after D).