Civil Service Exam Reviewer · Number Series · hard

What number(s) should complete the series: 3/5, 4/10, 5/20, 6/40, ?

  1. 7/80
  2. 7/45
  3. 6/80
  4. 8/80

Answer

A. 7/80

Solution

Numerators increase by 1; denominators multiply by 2: 7/80.

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