Choose some fractions and add them together. Can you get close to 1?

Can you find triangles on a 9-point circle? Can you work out their angles?

Draw some quadrilaterals on a 9-point circle and work out the angles. Is there a theorem?

Explore the relationships between different paper sizes.

Can you work out the irrational numbers that belong in the circles to make the multiplication arithmagon correct?

These Stage 3 and 4 problems have not yet been solved. Can you be the first?

These Stage 4 and 5 problems haven't been solved yet. Can you be the first?