A mathematician and his best friend, an engineer, attend a public lecture on geometry in thirteen-dimensional space.
"How did you like it?" the mathematician wants to know after the talk.
"My head's spinning," the engineer confesses.
"How can you develop any intuition for thirteen-dimensional space?"
"Well, it's not even difficult.
All I do is visualize the situation in n-dimensional space and then set n = 13." 
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I ordered a foot-long sandwich from a take-out restaurant and asked the clerk to cut it into fourths.
"I'm sorry, I can't," she said. "I already cut it in half."
Three elderly men are at the doctor for a memory test.
The doctor says to the first man, "What is three times three?"
"274," was his reply.
The doctor says to the second man, "It's your turn. What is three times three?"
"Tuesday," replies the second man.
The doctor says to the third man, "Okay, your turn. What's three times three?"
"Nine," says the third man.
"That's great!" says the doctor. "How did you get that?"
"Simple," says the third man. "I subtracted 274 from Tuesday."
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If I had only one day left to live, I would live it in my math class: it would seem so much longer.
2 > 1... unless that 1 is Chuck Norris.
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A blonde desserts her home town out of shame, and colors her hair brown.
She drives past a farm and sees all the sheep.
She goes up to the farmer and ask, "If I guess how many sheep you have can I have one?"
The farmer nodded. She continued. "159" The farmer is surprised. "How did you know?"
"Lucky guess" She grabs one and gets in her car.
The farmer comes up and says, "If I can guess your real hair color can I get my dog back?"
Q: How do you know if a Chinese tried to rob your house?
A: You get home and your maths homework is done, your computer is upgraded, and two hours later He is still trying to back out of your driveway.
"If you had a dollar," quizzed the teacher, "and you asked your father for another dollar and fifty cents, how much money would you have?"
"One dollar." answered little Johnny.
"You don't know your basic math." said the teacher shaking her head, disappointed.
Little Johnny shook his head too, "You don't know my daddy."
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E=mc squared.
E multiplied by mc squared=Chuck Norris Roundhouse Kick.
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An engineer, a physicist, and a lawyer were being interviewed for a position as chief executive officer of a large corporation.
The engineer was interviewed first, and was asked a long list of questions, ending with "How much is two plus two?"
The engineer excused himself, and made a series of measurements and calculations before returning to the board room and announcing, "Four."
The physicist was next interviewed, and was asked the same questions.
Before answering the last question, he excused himself, made for the library, and did a great deal of research.
After a consultation with the United States Bureau of Standards and many calculations, he also announced "Four."
The lawyer was interviewed last, and was asked the same questions.
At the end of his interview, before answering the last question, he drew all the shades in the room, looked outside the door to see if anyone was there, checked the telephone for listening devices, and asked "How much do you want it to be?"