Friday, March 04, 2005

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.
...
9988 is the number of prime knots with 13 crossings.
9995 has a square formed by inserting a block of digits inside itself.
9996 has a square formed by inserting a block of digits inside itself.
9999 is a Kaprekar number.


And everything in between! Very interesting!

1 comment:

JNB said...

This is great!!! I sent it on to Aunt Lib. I know she'll like it too.