Given Series

1. Given letter sequence: A, C, F, J, O, ?

Question

What is the missing letter in the sequence?

Answer

U.

Solution

1. Convert letters to numerical ranks:
2. A = 1
3. C = 3 (+2)
4. F = 6 (+3)
5. J = 10 (+4)
6. O = 15 (+5)
7. The positional step increases by +1 at each stage (+2, +3, +4, +5, +6).
8. Next position = 15 + 6 = 21.
9. The 21st letter of the alphabet is U.