In the series: O, T, T, F, F, S, S, E, ?, what comes next?
Q1. In the series: O, T, T, F, F, S, S, E, ?, what comes next?
Answer: N
Explanation: The series represents the first letter of the numbers One, Two, Three, Four, Five, Six, Seven, Eight, Nine, making 'N' the next letter