These are just quick little ones that I was told (and stumped) by my nephew.
A (very) basic knowledge of the english language is required to solve them (apologies to the international audience).
First:
What begins with 'e', ends with 'e' and has a single letter in it?
Second:
What begins with 'p', ends with 'e' and has thousands of letters in it?
e
. $\endgroup$ – Arcturus Dec 23 '15 at 7:44