What comes next in the pattern?
1, 1, 2, 3, 5, 8, 13, 21, __ What comes next?
2, 4, 8, 16, 32, 64, __ What comes next?
O, T, T, F, F, S, S, E, __ What is the next letter?
2, 3, 5, 7, 11, 13, 17, 19, __ What comes next?
1, 4, 9, 16, 25, 36, __ What comes next?