Good Jokes

Joke: Why were zinc and manganese dioxide arrested?

Joke: What do you do if you are asked to add the numbers from 1 to 100?

Joke: Math teacher: You can't use y to represent a single point!
Student: Y-naught?

Joke: What is black and white and green and black and white?

Joke: Knock knock!
Who's there?
Obama!
Obama who?
Obama self, can you be my friend?