Q: Why do you rarely find mathematicians spending time at the beach?
A: Because they can divide sin and cosine to get a tan! 
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Chuck Norris knows the last number of infinity.
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Teacher: "How much is half of 8?"
Little Johnny: "Up and down or across?"
Teacher: "What do you mean?"
Little Johnny: "Well, up and down makes a 3 or across the middle leaves a 0!"
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Hello, and welcome to the mental health hotline.
If you are obsessive-compulsive, press 1 repeatedly.
If you are co-dependent, please ask someone to press 2 for you.
If you have multiple personalities, press 3, 4, 5, and 6.
If you are paranoid, we know who you are and what you want. Stay on the line so we can trace your call.
If you are delusional, press 7 and your call will be transferred to the mother ship.
If you are schizophrenic, listen carefully and a small voice will tell you which number to press.
If you are manic-depressive, it doesn’t matter which number you press, no one will answer.
If you are dyslexic, press 969696969696969.
If you have a nervous disorder, please fidget with the dash key until a representative comes on the line.
If you have amnesia, press 8 and state your name, address, phone number, date of birth, social security number, and your mother’s maiden name.
If you have post-traumatic stress disorder, slowly and carefully press 000.
If you have bipolar disorder, please leave a message after the beep or before the beep. Or after the beep. Please wait for the beep.
If you have low self-esteem, please hang up. All our operators are too busy to talk to you.
If you have short-term memory loss, press 9. If you have short-term memory loss, press 9. If you have short-term memory loss, press 9. If you have short-term memory loss, press 9…
"What happened to your girlfriend, that really cute math student?"
"She no longer is my girlfriend. I caught her cheating on me."
"I don't believe that she cheated on you!"
"Well, a couple of nights ago I called her on the phone, and she told me that she was in bed wrestling with three unknowns..."
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One attractive young businesswoman to another over lunch:
"My life is all math. I am trying to add to my income, subtract from my weight, divide my time, and avoid multiplying."
Zenophobia: the irrational fear of convergent sequences.
Scientists don't bother to calculate how many years old the planet earth is, they just say it's one Chuck old.
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Student: What’s infinity?
Math Teacher: Think of a number.
Student: Okay, I’ve got one.
Teacher: Good. That’s not it.
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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