Exams › SSC CGL (Prelims) › Reasoning

What comes next in the sequence: 3C, 6F, 9I, 12L, ?

1. 15M
2. 15P
3. 15O
4. 15N

Correct answer: 15O

Solution

The numbers form an arithmetic progression: 3, 6, 9, 12, so the next number is 15. The letters are C, F, I, L, which advance by 3 positions each time, so the next letter is O.

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