Given series is A F Z U G L T _
Starts with A
A + 5 letters = F
go to end of alphabet= Z
Z - 5 letters = U
from F go one more to G + 5 letters = L
from U go one back to U, T - 5 letters = O
Second Method ::
Change the letters to their corresponding number.
A=1
B=2
C=3
...
Z=26
A F Z U G L T _
1 6 26 21 7 12 20 ?
Look at the pattern: the 1st and 3rd numbers = 27, 1+26
the 2nd and 4th numbers = 27, 6+21
the 5th and 7th numbers = 27,
so the 6 and 8th would also equal 27.
27 - 12 = 15,
so the letter is O.
