If the positions of the first and sixth letters of the word $BENEFICIAL$ are interchanged; similarly the positions of the second and seventh letters are interchanged and so on,which letter will be third from the right end after rearrangement?

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

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 even letter beginning from $B$ is replaced by an odd number beginning with $3$,which letter/number will be the third to the right of the tenth number/letter counting from your right?

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 above alphabet is written in the reverse order,which will be the eighth letter to the right of $O$?

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

How many three-letter meaningful English words can be formed from the letters of the word $NOTE$ that begin with $T$ and without repeating any letter within the word?