Each of the following questions is based on the following alphabet series.
$A, B, C, D, E, F, G, H, I, J, K, L, M$
$N, O, P, Q, R, S, T, U, V, W, X, Y, Z$
Which letter is midway between the $22^{nd}$ letter from the left and the $21^{st}$ letter from the right?

If the positions of the first and the sixth letters in the word $DISTRIBUTE$ are interchanged; similarly the positions of the second and the seventh,the third and the eighth and so on,which of the following letters will be the fifth from left after interchanging the positions?

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

$A$ group of letters is given which are numbered $1, 2, 3, 4, 5$ and $6$. Below are given four alternatives containing combinations of these numbers. Select that combination of numbers so that the letters arranged accordingly form a meaningful word.
$T, L, P, N, A, E$
$1, 2, 3, 4, 5, 6$

Select the series in which the letters skipped in between adjacent letters decrease in order.

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