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 $O$?

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 as far from the first letter of the alphabet as the letter $C$ is from the letter midway between $K$ and $R$ in the word $'QUICKSILVER'$?

Number of letters skipped in between adjacent letters in the series increases by one. Which of the following series observes the rule given above?

If any two letters in the word $'PRISON'$ have as many letters between them in the word as there are in the English alphabet,they form an alpha-pair. How many such alpha-pairs are there in the word $'PRISON'$?

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

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?