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?
The answer is $5x+8y$... What was the question?
Explore the relationships between different paper sizes.
Find the sum of this series of surds.
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?