Calibrate your sense of humor - rate:

1 

"Do you love your math more than me?"
"Of course not, dear - I love you much more."
"Then prove it!"
"OK... Let R be the set of all lovable objects..."

2  

A mathematician, a physicist, and an engineer were traveling through Scotland when they saw a black sheep through the window of the train.
"Aha," says the engineer, "I see that Scottish sheep are black."
"Hmm," says the physicist, "You mean that some Scottish sheep are black."
"No," says the mathematician, "All we know is that there is at least one sheep in Scotland, and that at least one side of that one sheep is black!"

3  

With great power comes great difficulty in factoring the polynomial.

4  

Three statisticians go bear hunting. They spot a bear, and the first statistician shoots, missing way to the left. The second one shoots, missing way to the right.

The third one jumps up, screaming "We got him! We got him!"

5  

A statistician had his head in an oven, and his feet in a bucket of ice.

On an average, he felt fine.