A patron is coming to collect a portrait first thing in the morning, and pixel Leonardo da Vinci has, as usual, spent the whole month inventing other things. The canvas is on the easel, the paints are mixed and there is just one night left to finish it. Tonight's challenge has a name: Masterpiece Math.
Every correct answer adds a new band of colour to the canvas, every streak makes the brush move faster and a single wrong answer smudges the paint. Fill in the whole picture and a mysterious smile appears. Leave it half done and the patron will just have to wait, which people around Leonardo are quite used to.










