Civil Service Exam Reviewer · Number Series · hard

What number(s) should complete the series: 0, 1, 2, 3, 6, 11, ?

  1. 20
  2. 17
  3. 21
  4. 22

Answer

A. 20

Solution

Each term is the sum of the three before it: 3 + 6 + 11 = 20.

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