These secondary problems have not yet been solved. Can you be the first?

Can you find a way to turn a rectangle into a square?

Can you work out how to produce different shades of pink paint?

Can you find an efficent way to mix paints in any ratio?

How much of the square is coloured blue? How will the pattern continue?

How can visual patterns be used to prove sums of series?

Start with a triangle. Can you cut it up to make a rectangle?