In this type of questions, you are given alphabets from A to Z. The position of a letter is given in the form of a puzzle. The candidate is required to find yhis letter. However, sometimes a random letter series is given and the candidate is required to find out how many times a letter satisfying the conditions specified in the question, occurs.

The following question 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 ?

A. M
B. N
C. O
D. L
E. None of these
Answer: A . M


The new alphabet series is :
Z  Y  X  W  V  U  T  S  R  Q  P  O  N
M  L  K  J  I  H  G  F  E  D  C  B  A

Counting from the right in the above series i.e., A, the thirteenth letter is M.