Civil Service Exam Reviewer · Number Series · medium

What number(s) should complete the series: 1, 8, 27, 64, ?

  1. 100
  2. 81
  3. 216
  4. 125

Answer

D. 125

Solution

The series is the perfect cubes 1³, 2³, 3³, 4³, 5³: the next term is 5³ = 125.

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