What starts and ends with a 'v' and is only one letter?.
What starts with 'e' and ends with 'e' and only has one letter in it?.
REAL math joke.
At a party vectors V and W see vector V+W poking in his head and asking: "Can I join?". "Yeah.", V and W reply; "It's a closed party..."
Q: What starts with E, ends with E, and has only 1 letter in it? A: Envelope.
What starts with "e," ends with "e," and contains one letter?.
Q: What starts with "e," ends with "e," and contains one letter? A. An envelope.
Q: What word begins and ends with an E, but only has one letter? A: Envelope!