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In the following series, the number of letters skipped in between the adjacent letters are in ascending order i.e. 1, 2, 3, 4. Which one of the following letter groups does not obey this rule ?

  • A.CEHLQ
  • B.DFIMR
  • C.GILPU
  • D.HJMPT

Answer: D

The group that does not obey the rule is HJMPT.

Count the skipped letters: H to J skips I (1), J to M skips K, L (2), but M to P skips only N, O (2) again, and P to T skips Q, R, S (3). The gaps 1, 2, 2, 3 are not 1, 2, 3, 4.

The other three follow the rule exactly. CEHLQ: 1 (D), 2 (F, G), 3 (I, J, K), 4 (M, N, O, P). DFIMR and GILPU give the same 1, 2, 3, 4 pattern.

The key is to count only the letters strictly between each pair, not the two letters themselves.

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