Civil Service Clerical Ability Practice exam

To find the letter that is as far before N as X is after S, we first need to determine the distance between S and X in the alphabet.

The letter S is the 19th letter, and X is the 24th letter. The distance between S and X can be calculated as follows:

24 (X) - 19 (S) = 5

Now, we need to find a letter that is 5 places before N. The letter N is the 14th letter of the alphabet. To find this letter, we subtract 5 from 14:

14 (N) - 5 = 9

The 9th letter of the alphabet is I.

Thus, the letter that is as far before N as X is after S is I, which is why this answer is correct.