Civil Service Exam Reviewer · Number Series · hard

What number(s) should complete the series: Z10, X13, V16, , R22?

  1. T18
  2. S19
  3. T20
  4. T19

Answer

D. T19

Solution

The letters move backward by 2 each time (Z, X, V, T, R), and the numbers add 3 each time (10, 13, 16, 19, 22).

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