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Complete the series BY5, EW7, HU11, ____.

  • A.KT13
  • B.JS13
  • C.JT13
  • D.KS13

Answer: D

The next term is KS13.

Each term has three parts that follow separate rules:

  • First letters B, E, H move forward three places, so the next is K.
  • Second letters Y, W, U move back two places, so the next is S.
  • The numbers 5, 7, 11 are successive prime numbers, so the next is 13.

The distractors each break one rule: J moves only two places, T moves back only one place, and KT13 has the wrong middle letter.

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