If it is possible to form a word with the first,fourth,seventh and eleventh letters in the word $SUPERFLUOUS$,write the first letter of that word. Otherwise,$X$ is the answer.

Which one word can be formed from the following letters?
$a, a, b, c, i, l, l, n, o, o, o, r, t$

How many pairs of letters are there in the word $HORIZON$ which have as many letters between them in the word as in the English alphabet?

How many $T$'s are there in the following sequence which are immediately preceded by $P$ but not immediately followed by $S$?
$S, T, P, Q, T, S, P, T, R, P, T, S, R, P, S, T, Q, P, T, R, P, T, M, P, T, S$

Arrange the given words in alphabetical order and choose the one that comes first.

How many pairs of letters are there in the word $REPURCUSSION$ which have as many letters between them in the word as in the alphabet and that too in the same order?