Civil Service Exam Reviewer · Number Series · hard

What should complete the series: XXXVII, XXXIV, XXXI, XXVIII, ?

  1. XXIV
  2. XXV
  3. XXVI
  4. XXII

Answer

B. XXV

Solution

In Arabic numerals: 37, 34, 31, 28 (subtract 3). Next: 25 = XXV.

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