Examine the letter sequence: B, E, I, N, T, ... What is the next letter in this sequence?

Answer and explanation

Correct answer: A. A

  1. Step 1: Convert each letter to its position in the standard 26-letter English alphabet:
  2. Step 2: B = 2, E = 5, I = 9, N = 14, T = 20.
  3. Step 3: Examine differences between successive terms: 5 - 2 = +3; 9 - 5 = +4; 14 - 9 = +5; 20 - 14 = +6.
  4. Step 4: The pattern adds +1 to the difference at each step. Next difference must be +7.
  5. Step 5: Compute next position: 20 + 7 = 27. Wrapping around modulo 26: 27 - 26 = 1 = letter 'A'.
Answer
A.
Why not the others: 'Z' corresponds to position 26 (adding +6 again); 'Y' corresponds to position 25; 'B' corresponds to position 28 (adding +8 prematurely).

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