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 is the only letter that occurs twice?

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 letters arranged accordingly form a meaningful word.

$J\,T\,A\,E\,N\,M$

$1\,\,2\,\,3\,\,4\,\,5\,\,6$

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 every alternate letter starting from $B$ is deleted from the given alphabet,which of the following will be the tenth letter from the right end?

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 every alternate letter starting from $B$ of the given alphabet is written in small letters,and the rest are written in capital letters,how will the month of 'September' be written?

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

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