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Select the combination of letters that when sequentially placed in the blanks of the given series will complete the series. AZ, BY, DW, _T, K_, PK

  • A.HP
  • B.GP
  • C.GO
  • D.HQ

Answer: B

The blanks are filled by G and P, so the answer is GP.

Take the first letters: A, B, D, _, K, P. They move forward by 1, 2, 3, 4 and 5 places (A to B is +1, B to D is +2, D to G is +3, G to K is +4, K to P is +5), so the first blank is G. Take the second letters: Z, Y, W, T, _, K. They move back by 1, 2, 3, 4 and 5 places (Z to Y, Y to W, W to T, T to P, P to K), so the second blank is P.

The other options, HP, GO and HQ, each fail at least one of the two letter patterns.

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