Find the next number in the sequence: 4, 31, 7, 24, 10, ?

Answer and explanation

Correct answer: A. 17

  1. Step 1: The sequence is two patterns taken alternately: 4, 7, 10 (adding 3) and 31, 24 (subtracting 7).
  2. Step 2: The next term continues the second pattern: .
Answer
17.
Why not the others: 13: it continues only the rising pattern. 27: the two patterns are mixed.

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