Puzzle warm-up
Here's a quick little mental puzzle to warm up your brain cells.
How long does it take you to re-arrange the six shapes into a cross? Rather than printing the page and finding a pair of scissors, try to solve this in your head.
Use each of the six shapes once (the four yellow triangles, and the red & blue err... not-triangles), move the shapes together, without overlapping, to form a cross. Then check your result here.
