If the alphabets were written in the reverse order, which letter will be the fifth letter to the left of the fourteenth letter from the left?

R

In reverse order:

Since the letters of the alphabet are reversed take the left and right as right and left. Thus, the 14th letter from the right of the alphabet is M and the 5th letter from M to the right is R.

OR, Shot cut method for these type of questions:

**If in question both left word is using then take difference of both the numbers given in the question and find the alphabet on that position (difference) from the end of the series.

Here,

Difference = 14 - 5 = 9

On 9th position from the end (27 - 9 = 18) = R

1   2    3    4   5    6   7     8    9  10  11  12  13

 A   B   C    D   E    F   G    H    I    J    K    L   M

 ↓    ↓    ↓    ↓    ↓     ↓   ↓    ↓     ↓   ↓    ↓    ↓    ↓

 Z   Y    X   W   V    U   T    S    R   Q   P    O   N

26  25  24  23  22  21  20  19  18  17  16  15  14