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What comes next in the pattern: F1, I3, L5, O7, ?

1. R9
2. Q9
3. S9
4. P9

Correct answer: R9

Solution

The letters follow the sequence F, I, L, O, R, increasing by 3 positions each time. The numbers follow 1, 3, 5, 7, 9, increasing by 2, so the next term is R9.

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