Why do they never serve beer at a math party?
Because you can't drink and derive.
Why do they never serve beer at a math party?
Because you can't drink and derive.
This joke is funny because it plays on the similar sound between "derive", a math term, and "drive". The joke makes light of the idea that you shouldn't "drink and derive", which sounds like "drink and drive". Listen here, you are probably the kind of person to drink and derive and end up with a D-!