Math

A couple of short items that may tickle your fancy:

I picked up the reference to this site on Blogdex.

What's Special About This Number?

0 is the additive identity.
1 is the multiplicative identity.
2 is the only even prime.
3 is the number of spatial dimensions we live in.
4 is the smallest number of colors sufficient to color all planar maps.
5 is the number of Platonic solids.
6 is the smallest perfect number.
7 is the smallest number of integer-sided rectangles that tile a rectangle so that no 2 rectangles share a common length.
8 is the largest cube in the Fibonacci sequence.
9 is the maximum number of cubes that are needed to sum to any positive integer.
10 is the base of our number system.
11 is the largest known multiplicative persistence.
12 is the smallest abundant number.
13 is the number of Archimedian solids.
14 is the smallest number n with the property that there are no numbers relatively prime to n smaller numbers.
15 is the smallest composite number n with the property that there is only one group of order n.
16 is the only number of the form x^y=y^x with x and y different integers.
17 is the number of wallpaper groups.
18 is the only number that is twice the sum of its digits.
19 is the maximum number of 4^th powers needed to sum to any number.
20 is the number of rooted trees with 6 vertices.

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This came to me via email from a co-worker. It's a bit long, but it's good stuff. Reminds me of the old days of the internet, when we only had text-based messages and bulletin boards, no Web. Geeks spent their time sharing stuff like this.

1. Ratio of an igloo's circumference to its diameter = Eskimo Pi
2. 2000 pounds of Chinese soup = Won ton
3. 1 millionth of a mouthwash = 1 microscope
4. Time between slipping on a peel and smacking the pavement = 1 bananosecond
5. Weight an evangelist carries with God = 1 billigram
6. Time it takes to sail 220 yards at 1 nautical mile perhour = Knotfurlong
7. 365.25 days of drinking low calorie beer = 1 Lite year
8. 16.5 feet in the Twilight Zone = 1 Rod Serling
9. Half a large intestine = 1 semicolon
10. 1,000,000 aches = 1 megahurtz
11. Basic unit of laryngitis - 1 hoarsepower
12. Shortest distance between two jokes - a straight line
13. 453.6 graham crackers = 1 pound cake
14. 1 million microphones = 1 megaphone
15. 1 million bicycles = 1 megacycles
16. 365.25 days = 1 unicycle
17. 2000 mockingbirds = two kilomockingbirds
18. 10 cards = 1 decacard
19. 52 cards = 1 deckacard
20. 1 kilogram of falling figs = 1 fig Newton
21. 1000 grams of wet socks = 1 literhose
22. 1 millionth of a fish = 1 microfiche
23. 1 trillion pins = 1 terrapin
24. 10 rations = 1 decaration
25. 100 rations = 1 C-ration
26. 2 monograms = 1 diagram
27. 8 nickels = 2 paradigms
28. 2.4 statute miles of intravenous surgical tubing at Yale University Hospital = 1 I.V. League