Civil Service Exam Reviewer · Number Series · hard

What number(s) should complete the series: 215, 342, 511, 728, 999, ?

  1. 1331
  2. 1270
  3. 1328
  4. 1330

Answer

D. 1330

Solution

The terms follow n³ − 1 for n = 6, 7, …; for n = 11: 1330.

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