What number comes next in the series 5, 33, 7, 31, 9, 29, ...?

Answer and explanation

Correct answer: D. 11

  1. Step 1: Two patterns alternate. The odd positions rise by 2 (5, 7, 9) so the next odd-position term is 11.
Answer
11.
Why not the others: 27, 9 and 13 don't fit.

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