Civil Service Exam Reviewer · Number Series · hard

What number(s) should complete the series: 4, 8, 16, 28, 44, 64, ?

  1. 84
  2. 92
  3. 88
  4. 87

Answer

C. 88

Solution

Differences 4, 8, 12, … increase by 4; next difference is 24: 64 + 24 = 88.

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