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Which letter should replace the question mark in the series W, T, P, K, ?

Competition practiceAlphanumeric / Series
  • AF
  • BD
  • CG
  • DE

Step-by-Step Solution

The series runs backwards through the alphabet by a step that grows each time. W (23rd) back three gives T (20th); T back four gives P (16th); P back five gives K (11th). The next step is six, and K back six is the 5th letter, E. F (6th) comes of repeating the step of five, D (4th) of jumping seven, and G (7th) of repeating the step of four.
Answer: D) E

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