An interview was conducted to test the structure, usage and competence of all the English Letters. To do this, each letter was interviewed for one hour in sequence and the interview was expected to take a whole day. Letter A was the first, then B, C, D ... till letter X which rounded off the interview. Why was letter Y and Z left out?

There are 24 hours in a day and 26 Letters. Each letter is allotted one hour. Hence, letter Y and Z could not be interviewed because both exceeded the 24 hours Standard Time. Letter Y and Z are 25th and 26th respectively.