Civil Service Exam Reviewer · Number Series · hard

What number(s) should complete the series: 3, 12, 28, 53, 89, 138, ?

  1. 202
  2. 187
  3. 203
  4. 154

Answer

A. 202

Solution

Differences are perfect squares 3², 4², …; add 8² = 64: 202.

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