What is special about the difference between squares of numbers adjacent to multiples of three?
A napkin is folded so that a corner coincides with the midpoint of an opposite edge. Investigate the three triangles formed.
An observer is on top of a lighthouse. How far from the foot of the lighthouse is the horizon that the observer can see?
If a sum invested gains 10% each year how long before it has doubled its value?
Explore the relationships between different paper sizes.
Infographics are a powerful way of communicating statistical information. Can you come up with your own?
What does this number mean? Which order of 1, 2, 3 and 4 makes the highest value? Which makes the lowest?
Do you have enough information to work out the area of the shaded quadrilateral?
