How many questions are there to which the answer is FOUR?

What is 2 plus 2?
What is 2 x 2?
What is the Decimal for 100 in Binary?
What is the smallest non-prime even number?
What was the catchphrase of a Monty Python sketch?
How many new Apprentice DMs are there on Avlis?
Yes, it is true. There are now FOUR new Apprentice DMs on Avlis [