This is the prime numbers:
O = 1
T = 3
F = 5
S = 7
E = 11
T = 13
S = 17
One has been included although not being prime. Two has been left out although prime. The next Prime number after 17 is 19, and so the next letter would be N.
l
G
When you answer sequence questions, look for a repetition anywhere. We can see that the first letter and the last letter is an 'F' so the sequence must be FHEXFHEXF.... so your answer is F.
k
w
the next letter would be 'b'
f
E
E. Eight.
d
l
G
The next letter is L. Here is the sequence: a _ _ de _ _ hi _ _ lm.
The next letter in the sequence is T. The sequence follows the alphabetical order, but jumps around by alternating the location of the letters in the alphabet.
When you answer sequence questions, look for a repetition anywhere. We can see that the first letter and the last letter is an 'F' so the sequence must be FHEXFHEXF.... so your answer is F.
N (First, Second, Third, Fourth, Fifth, Sixth, Seventh, Eighth, Ninth)
k... for king think deck of cards