Civil Service Exam Reviewer · Number Series · medium

What number(s) should complete the series: B4, D8, F12, H16, ?

  1. J24
  2. J20
  3. I20
  4. K20

Answer

B. J20

Solution

The letters skip one each time (B, D, F, H, J), and the numbers add 4 each time (4, 8, 12, 16, 20).

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