Civil Service Exam Reviewer · Number Series · medium

What number(s) should complete the series: 3, 4, 6, 10, 18, 34, ?

  1. 50
  2. 67
  3. 66
  4. 68

Answer

C. 66

Solution

Differences double: 1, 2, 4, … next difference 32: 34 + 32 = 66.

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