Civil Service Exam Reviewer · Number Series · medium

What number(s) should complete the series: 1/3, 2/5, 3/7, 4/9, ?

  1. 5/10
  2. 4/11
  3. 6/11
  4. 5/11

Answer

D. 5/11

Solution

The numerator increases by 1 each time (1,2,3,4,5) and the denominator increases by 2 each time (3,5,7,9,11).

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