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.
In the following series, count each N which is immediately followed by X but X is not immediately followed by T. How many such N's are there ?
N X N T Q M N X T M X N X C N Q M N N X Q N X T X N A M X N X M
N X N T Q M N X T M X N X C N Q M
N N X Q N X T X N A M X N X M