# Math Funny

Discussion in 'Teacher Time Out Archives' started by Tasha, Jul 26, 2007.

1. ### TashaPhenom

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Jul 26, 2007

I thought this was too funny! I knew that a few of you, at least, would appreciate it too :lol:

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Jul 26, 2007

I like that!

Speaking of symbols, back in the 70's, when the US had just begun trading again with China, a friend told me that watches from China were being marketed, and they were selling fast, because the Chinese characters on the dial were so attractive and unusual. Unfortunately, the symbols turned out to say "imperalist running dog", or something like that.

Hope the drivers don't get pi mixed up with infinity!

4. ### paperheartGroupie

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Jul 27, 2007

love that. might make a sign for my classroom. Its cute!

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Jul 27, 2007

I thought the following was a funny anecdote:

The following problem can be solved either the easy way or the hard way.

Two trains 200 miles apart are moving toward each other; each one is going at a speed of 50 miles per hour. A fly starting on the front of one of them flies back and forth between them at a rate of 75 miles per hour. It does this until the trains collide and crush the fly to death. What is the total distance the fly has flown?

The fly actually hits each train an infinite number of times before it gets crushed, and one could solve the problem the hard way with pencil and paper by summing an infinite series of distances. The easy way is as follows: Since the trains are 200 miles apart and each train is going 50 miles an hour, it takes 2 hours for the trains to collide. Therefore the fly was flying for two hours. Since the fly was flying at a rate of 75 miles per hour, the fly must have flown 150 miles. That's all there is to it.

When this problem was posed to John von Neumann, he immediately replied, "150 miles."
"It is very strange," said the poser, "but nearly everyone tries to sum the infinite series."
"What do you mean, strange?" asked Von Neumann. "That's how I did it!"

(Credit to http://www.math.utah.edu/~cherk/mathjokes.html#topic8)

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