The acornQ. What did the mathematical acorn say when it grew up?

HalloweenQ: What do you get if you divide the circumference of a jackolantern by its
diameter?

Mathematicians at the beachQ: Why do you rarely find mathematicians spending time at the beach?

Zero said to eightQ: What does the zero say to the the eight?

A cat has nine tailsQ. How can you prove that a cat has nine tails?

TerroristNew York (CNN). At John F. Kennedy International Airport today, a Caucasian male (later discovered to be a high school mathematics teacher) was arrested trying to board a flight while in possession of a compass,
a protractor and a graphical calculator.

MermaidQ: What does the little mermaid wear?

FearQ. Why is the number six scared of seven?

Crushed AngleQ. What do you call a crushed angle? A. A rectangle! 
No homeworkPupil: Would you punish me for something I haven't done? Teacher: Of course not. Pupil: That's good because I haven't done my homework! 
Dog with a bad footQ. Why is a dog with a bad foot like adding 6 and 7? A. Because he puts down three and carries the one. 
MisersQ. Why are misers good Maths Teachers? A. Because they know how to make every penny count!. 
PowersQ. Why are powers like fish? A. Because they're all indices (in the seas!) 
How many times?Q: how many times can you subtract 7 from 83, and what is left afterwards? A: I can subtract it as many times as I want, and it leaves 76 every time. 
Sad TextbookQ. Why did the Maths textbook look so sad? A. Because it had so many problems! 
Three types of peopleThere are three types of people in the world, those who can count and those who can't. 
Hot cornerIf it is cold, go and stand in the corner, because it is 90 degrees there. 