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The spacing alternates between two values throughout. Supply the term that completes the run.
C, E, H, J, M, ?

  • A.N
  • B.P
  • C.O
  • D.L

Answer: B

Correct answer: O

The steps run +2, +3, +2, +3: C(3), E(5), H(8), J(10), M(13). The next step is +2, giving position 15, which is O. The pattern is the same as several others in this topic but begun from a different letter, so the answer has to be counted rather than recalled. N at 14 is a single step and is what the eye supplies when the alternation is missed. Because the gaps repeat in pairs, the series advances five places every two terms, and C, H, M form a five-step series within it.

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