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CA Foundation · Quantitative Aptitude · Number Series, Coding-Decoding and Odd Man Out

Find the next term in the series: AB, DG, HM, MT, ?

The next term is SB. First letters rise by 3, 4, 5, 6 (A, D, H, M, S). Second letters rise by 5, 6, 7, 8 (B, G, M, T, then 28, which wraps to 2, i.e. B).

  1. ASB
  2. BSCCorrect
  3. CTB
  4. DRC

Explanation

First letters: A(1), D(4), H(8), M(13) with differences 3, 4, 5, so the next difference is 6 giving 19 = S. Second letters: B(2), G(7), M(13), T(20) with differences 5, 6, 7, so the next difference is 8 giving 28, which wraps around (28-26=2) to B. So the term is SB, not SC.

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