Multiple choice

If the letters in the word 'SEDIMANTATION' are rearranged as they appear in the English alphabet, then the position of how many letters will remain unchanged after the rearrangement?

  1. 0

  2. 1

  3. 2

  4. 3

  5. 4
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B Correct answer
Explanation

SEDIMANTATION (13 letters): A, A, D, E, I, I, M, N, N, S, T, T. Alphabetical: A, A, D, E, I, I, M, N, N, S, T, T. Comparing original to sorted: S-A, E-A, D-D (match), I-E, M-I, A-I, N-M, T-N, A-N, T-S, I-T, O-T, N-T. Only 'D' remains in the same position.

AI explanation

The original positions of the letters in SEDIMANTATION are kept the same while sorting them alphabetically into A, A, D, E, I, I, M, N, N, O, S, T, T. Comparing the original sequence to the sorted sequence, only the letter M at the seventh position remains unchanged. Thus, exactly 1 letter maintains its original position.

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