Magic Cube of Order 5
In a perfect magic cube the rows, columns, pillars, space diagonals, and the diagonals of each n×n orthogonal slice sum to the same number. For centuries, whether an order-five magic cube existed was unknown, until November 14, 2003, when C. Boyer and W. Trump discovered a solution. Note that the numbers 1 to 125 are used in this cube. In this Demonstration, you can highlight each of the 109 lines that add up to 315.