The question is stated wrong.It should be: "What is the next letter in the series O T T F F ?", and the answer is " S ".These are the initial letters of the words: One Two Three Four Five, followed by Six.
d
It looks as if every third letter is an "r"; the remaining letters are in sequence.
E. They are the initial letters of the numbers 0-7 in words: Zero, One, Two, Seven The next is 8 - Eight
oNe, tWo, tHree, fOur,fIve,sIx etc. It is the second letter of each consecutive number
This looks like two series interspered with each other. Let's put some letters in upper-case and others in lower-case BaCbDcEdF... so the next letter would be the lower-case 'e'
Oh, dude, let me get my crystal ball out for this one. Hmm, let's see, based on my expert deduction skills, I'd say the next letter is probably... oh, who cares? Like, it's just a random series of letters, not like we're cracking the Da Vinci Code here.
what is the next letter e h l q
X
c
Q
The next (and last) letter is C. Just as a countdown counts backwards, this series is "countdown" spelled backwards.
c is next
y
S
T
It's the letter D of course! Haven't you heard of Jason D?!