Find the next term in the series: BEH, KNQ, TWZ, ( ? ). Each position advances by +9 in the alphabet with wrap-around.
Verbal Reasoning
Number Series
Difficulty: Easy
Choose an option
Answer
Correct Answer: CFI
Explanation
Introduction / Context:Here, each of the three letter positions undergoes the same forward shift by a fixed value across terms.
Given Data / Assumptions:
- Series: B E H; K N Q; T W Z; next = ?
- Alphabet indices with wrap-around (A=1 … Z=26).
Concept / Approach:Compute letter-to-letter jumps across terms for each position; a constant +9 emerges.
Step-by-Step Solution:
First letters: B(2) → K(11) (+9) → T(20) (+9) → C(3) (+9 wrap).Second letters: E(5) → N(14) (+9) → W(23) (+9) → F(6) (+9 wrap).Third letters: H(8) → Q(17) (+9) → Z(26) (+9) → I(9) (+9 wrap).Verification / Alternative check:Reversing from CFI by −9 retrieves TWZ, confirming the fixed-shift pattern.
Why Other Options Are Wrong:IJL, BDF, ADG use different step sizes and do not preserve the +9 rule in all three positions.
Common Pitfalls:Missing wrap-around arithmetic when passing Z to A.
Final Answer:CFI.