Good Riddles

Question: Two cops walk into a doughnut shop. One gets a sprinkle doughnut and the second one gets a sugar doughnut. What did the third cop get?

Question: How high would you have to count before you use the letter 'A' in the spelling of a number?

Question: Mr. Niceguy donated one million dollars to help feed starving people. After he donated the money he was a millionaire.

How did he become a millionaire?

Question: I can pogo on the moon, but not Mars. I can pogo on this table, but not on a stick. What can assure us to be able to pogo on objects at all times?

Question: What is green and has wheels?