AZ, BY, CX, ? — Number & Letter Series Aptitude Question
AZ, BY, CX, ?: Find the next pair: AZ, BY, CX, ? Answer and worked solution on CodeKairo.
- Topic: Number & Letter Series
- Section: Logical Reasoning
- Difficulty: Medium
- Time target: 50 seconds
Question
Find the next pair:
AZ, BY, CX, ?
Options
- DV
- DW
- EW
- EV
Show the answer and the worked solution
Correct answer: B. DW
Worked solution
- First letters: A, B, C → next is D.
- Second letters: Z, Y, X → next is W.
- The pair is DW.
Answer: DW.
The idea
Treat each position in the pair as its own series. Here one counts up and the other counts down.
Shortcut. Each pair is a letter and its mirror, with positions adding to 27 (A 1 + Z 26), so D (4) pairs with 23 = W.
Common trap. DV — looks right because D correctly follows C, but the second letters Z, Y, X step back by one, so X is followed by W, not V.