From the Manufacturer
The puzzle is a maddening addition. Place the number buttons randomly on the ball. Solve the puzzle by matching the dots to the numbers so that all of the dots touching a number add up to that amount. There are thousands of ways to play. It all adds up to fun - you can count on it.
IC2869 Features: -Icosoku 3D brain teaser puzzle.-Icosoku is a mathematical masterpiece.-Position the tiles so that all of the dots encircling a yellow peg add up to that number.-Puzzle can be solved every time, regardless of how you the yellow pegs are arranged, so repeat play is endless.-Crunching numbers has never been so much fun.