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Terms have been taken alternately from two widely separated parts of the alphabet. Name the next one.
M, A, N, B, O, ?

  • A.P
  • B.C
  • C.D
  • D.B

Answer: A

Correct answer: C

Separating alternate terms gives M, N, O in the odd positions and A, B in the even ones, each advancing by one. The next term is the third of the second series, which is C. Interleaved series are recognised by the terms alternating between two widely separated parts of the alphabet. P is the tempting answer because it continues the series the eye follows most readily, but it belongs to the wrong strand. The two strands here start far apart, at M and at A, which is what makes the alternation visible at a glance rather than needing the terms to be separated first.

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