Study the letter series given below and answer the question that follows:
$H, D, Y, S, M, W, N, B, Q, P, O, C, R, T, B, L, Z, V, E, G, U, F$
Which letter has the same neighbours as in the alphabetical order,although they have changed places?

Arrange the following words in the sequence in which they occur in the dictionary:
$1.$ Brook $2.$ Bandit $3.$ Boisterous $4.$ Baffle $5.$ Bright

Each of the following questions is based on the following alphabet series.
$A, B, C, D, E, F, G, H, I, J, K, L, M$
$N, O, P, Q, R, S, T, U, V, W, X, Y, Z$
If the letters of the given alphabet interchange positions,so that $A$ takes the place of $Z$ and $Z$ takes the place of $A$; $B$ takes the place of $Y$ and $Y$ takes the place of $B$ and so on,what will be the thirteenth letter from the right?

Arrange the given names in the order in which they would occur in a telephone directory and choose the one that comes in the middle.

If it is possible to make only one meaningful English word with the third,the seventh,the eighth and the tenth letters of the word $PREDICAMENT$,which of the following will be the third letter of that word? If no such word can be made,give $X$ as the answer and if more than one such word can be made,give $Y$ as the answer.

If by arranging the letters of the word $NABMODINT,$ the name of a game is formed,what are the first and the last letters of the word so formed?