Letters

Sequence 1
What are the next two letters in the following series and why?
W A T N T L I T F S _ _

Sequence 2
o t t f f s s _ _ _

Sequence 3
B C D E I K O X ?

Sequence 4
B C D E G ?

Sequence 5
A E F H I K L M ?

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Numbers

Sequence 1
1
11
21
1211
111221
312211
13112221
?

Sequence 2
1 2 4 8 16 32 ?

Sequence 3
1 2 3 5 8 13 21 ?

Sequence 4
1 2 4 7 11 16 ?

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