Fit all the pieces into the tray.
Please note that plastic colors vary. Two squares form a rectangle. Two triangles (one half of the square each) are attached to the squares but only to the longer side(s) of the rectangle. 9 pieces represent a full set. You need 2 more squares and 2 more triangles to fill the 5×6 tray completely. Those 2 squares are placed in two diagonal corners, so ther are two empty triangles – somewhere…. 4 solutions. Design: © Alexander Magyarics