MATH PROBLEM!!!!! help???? ?

Question

ok i need to figure out the next two letters in this sequence...

O,T,T,F,F,S,S,E...

Answer 1

It's N T

One Two Three Four Five Six Seven Eight Nine Ten

Edit - The sequence is the first letter of the numbers starting from One.

Answer 2

its "WTF"! haha jus kidding...

Im not sure, but its probably O,T,T,F,F,S,S,E..."E", "R", "R"

Answer 3

wow dude c'mon its math. easy, just answer it with your brains. if not how are you going to get bettter?

but i would probably have to guess o t t f f s s e e r r  OR e s s  

Answer 4

E, S