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Find the one which does not belong to that group ?

  • A.YCAEC
  • B.KOMQO
  • C.PTRUT
  • D.GKIMK

Answer: C

Each group of five should alternate forward four and back two:

  • Y(25), C(3), A(1), E(5), C(3): \( +4,\; -2,\; +4,\; -2 \)
  • K(11), O(15), M(13), Q(17), O(15): \( +4,\; -2,\; +4,\; -2 \)
  • G(7), K(11), I(9), M(13), K(11): \( +4,\; -2,\; +4,\; -2 \)
  • P(16), T(20), R(18), U(21), T(20): \( +4,\; -2,\; +3,\; -1 \)

PTRUT breaks the rhythm at the third step, taking three instead of four. PTRVT would fit. As with YCAEC, the alphabet is taken to wrap round from Z to A.

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