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?

In the following series,count each $N$ which is immediately followed by $X$ but $X$ is not immediately followed by $T.$ How many such $N's$ are there?
$N, X, N, T, Q, M, N, X, T, M, X, N, X, C, N, Q, M, N, N, X, Q, N, X, T, X, N, A, M, X, N, X, M$

Number of letters skipped in between adjacent letters in the series is two. Which one of the following alternatives observes this rule?

$A$ 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 the combination of numbers so that the letters arranged accordingly form a meaningful word.
$E, H, N, T, O, R$
$1, 2, 3, 4, 5, 6$

How many $D$'s are there in the following series which are immediately followed by $W$ but not immediately preceded by $K$?
$K, D, C, W, K, D, W, N, K, G, D, W, W, D, H, K, V, D, W, Z, D, W$

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