What do the Euclidean Algorithm for finding the Greatest Common Divisor and 2Bik’s Cube have in common? They are both things PhD grad, and local Chicago mentalisimo Kousha Nejad has spent a lot of time on. When he’s not digging into differential equations, Mr. Nejad is creating interactive puzzles to challenge both your visual perception and critical thinking. Bet you never thought your Parietal Lobe could get in such good shape by simply arranging some colored tiles. Or is it really that simple? There’s only one way to find out.