Math Jokes

Joke: Why was 6 afraid of 7?

Joke: Why does nobody talk to pi?

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

Joke: What is one math problem that no German person can get wrong?

Joke: Mathematician: You're a 10
Girlfriend: Awe thank you.
Mathematician: In base 2...
Girlfriend: ...