Civil Service Exam Reviewer · Number Series · hard

What number(s) should complete the series: 19, 28, 44, 69, 105, 154, ?

  1. 218
  2. 203
  3. 219
  4. 170

Answer

A. 218

Solution

Differences are perfect squares 3², 4², …; add 8² = 64: 218.

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