"What's special about this number?" is a math-geek cool site explaining the significance of thousands of numbers between 0 and 9999.
Sample from the site...
Sample from the site...
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 faces of a regular polygon that is not constructible by straightedge and compass.
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.
4920 = 6666 in base 9.
9768 = 2 * 22 * 222.
9801 is 9 times its reverse.
9999 is a Kaprekar number...
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 faces of a regular polygon that is not constructible by straightedge and compass.
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.
4920 = 6666 in base 9.
9768 = 2 * 22 * 222.
9801 is 9 times its reverse.
9999 is a Kaprekar number...
