please give me the BEST BEST best math trivia you know?

Question

Or at least a site of very good math trivias.

I need a trivia for a math exhibit open for everybody--not for experts only!!
Thank you very much!!

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Answer 1

1/3 = 0.3333333,,,,,,,,,,,,,,,
1/3 + 1/3 + 1/3 = 0.999999................
But it doesn't. 1/3 + 1/3 + 1/3 = 1

Answer 2

I have an idea for an exhibit you can make, and people can play with it at your exhibit. It's called the Book Stacking Problem, based on a mathematical gem called the harmonic series. The math proves that you can stack books over the side of a table as far as you want, without them falling over! You should make a model of this and people will love it. (See the reference.)

Answer 3

A sheet of paper is .001 inch thick. Tear the paper in half and put the two sheets together. Tear again and do the same. Keep doing that until you have done it 50 times. How high will the stack of paper be?

The number of sheets of paper you will have is 2 to the 50th power.

Divide this by .001 to get the number of inches.

Divide the inches answer by 12 to get the number of feet.

Divide the feet answer by 5280 to get the number of miles.

The stack of paper is over 17,000,000 miles high.

This is theoretical, of course.

Answer 4

What is the integral of 1/cabin d cabin

answer = ln cabin + c

"Log Cabin + Sea"

Usually gets a chuckle

Or when you take the integral of something it sounds likes a nice bloke from Yorkshire. Integrand = Int He Grand

Also usually gets a chuckle

For LeAnne - 0.999 recurring i.e. the nines go on forever does equal 1. I know it sounds mad, but it does.

Answer 5

what happens to the digits of 142857 when you multiply the number with 2, 3, 4, 5 or 6?

Answer 6

e to the pi i squared =1

That's the weirdest mathematical truth I know of.