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Find the next letter in the series: C, F, I, L, O, ?

Competition practiceReasoning & Mental Ability
  • AP
  • BQ
  • CR
  • DS

Step-by-Step Solution

Each letter advances by 3 positions: C(3), F(6), I(9), L(12), O(15), so the next is position 18 = R.
Answer: C) R

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