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

Find the next term in the series: B, D, G, K, P, ?

The next letter is V. The letters are at positions 2, 4, 7, 11, 16, and the gaps increase by one each time (2, 3, 4, 5). The next gap is 6, so 16 becomes 22, which is the letter V.

  1. AU
  2. BVCorrect
  3. CW
  4. DX

Explanation

Positions are B=2, D=4, G=7, K=11, P=16. The differences are 2, 3, 4, 5, so the next difference is 6, giving 16+6=22, which is V. Option U (21) results from adding only 5 again.

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