If you count 21 letters in the English alphabet from the end and 20 letters from the beginning. Which letter will appear exactly in the middle?

Which letter will be 13th to the left of 9th the letter from the right in the following series of letters?

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

Which letter is the 8th to the right of the 14th letter from your left in the following alphabet series?

A B C D E F G H I J K L M N O P Q R ST U V W X Y Z

In the series given below, count each $5$ which is immediately preceded by $3$ and immediately followed by $7$. How many such $5$'s are there?

$1357 574 737 256 585 7456 557 1557755$.

What will be the middle digit of the middle number after the following numbers are arranged in descending order?

$268, 197, 678, 129, 259$

How many $6$'s are there in the following series of numbers which are preceded by $7$ but not immediately followed by $9$?

$67956 976 876 786 946 77695 763$