How many such pairs of letters are there in the word $EXCURSION$,each of which has as many letters between them in the word as they have in the English alphabet?

If it is possible to make only one meaningful word from the second,the fourth,the fifth,the seventh and the eleventh letters of the word $DISTRIBUTION$,the third letter of that word is your answer. If more than one such word can be formed,your answer is $M$,and if no such word can be formed,your answer is $X$.

If $A$ is denoted by $1, B$ by $2, C$ by $3, D$ by $1, E$ by $2, F$ by $3$ and so on,what would be the sum of the digits for the word $MULE$?

If it is possible to make a meaningful word with the second,the sixth,the ninth and the twelfth letters of the word $CONTRIBUTION$,which of the following will be the last letter of that word? If more than one such words can be made,give $M$ as the answer and if no such word is there,give $X$ as the answer.

Find which one word cannot be made from the letters of the given word: $VENTURESOME$.

Find which one word cannot be made from the letters of the given word.
$SUPERIMPOSABLE$