What comes next? 2, 5, 11, 23, 47, ?
Answer: C: 95
Why: Double each term and add 1: 2 x 2 + 1 = 5, 5 x 2 + 1 = 11, and 47 x 2 + 1 = 95. 94 is what you get if you only double and forget the +1. 71 comes from repeating the last gap of 24 instead of noticing that the gaps double.
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Number series are reported in the logical or problem-solving part of Bain's TestGorilla mix. The skill is finding the rule fast: check the gaps between terms first, then whether the gaps themselves follow a pattern, then whether each term is a multiple of the last.
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