Via About.com I found an interesting mathematical puzzle game called Rising Star.
The challenge of this mathematical puzzle is to enter a different number in each of the 21 circle (from 1 through 21) so that the sum of the digits in any straight line is the same.
If you really like this puzzle you can also find a printer friendly version of this puzzle at the About.com website (please consider our environment before printing). Happy Puzzling!
Tags: Math | Puzzle