Let's play a math game!
Okay, here's how it works. The goal is to get the numbers at each vertex of each concentric shape to add to the same thing. The number in the middle are the current totals for each radii. Click any box in a given ring to get that ring to rotate clockwise. Hold ctrl and click on a box to get that ring to rotate counter clockwise. When all sums are the same, you've won!