Show that all pentagonal numbers are one third of a triangular number.
What 3D shapes occur in nature. How efficiently can you pack these shapes together?
What does Pythagoras' Theorem tell you about the radius of these circles?
Weekly Problem 52 - 2014
Four arcs are drawn in a circle to create a shaded area. What fraction of the area of the circle is shaded?
How can you decide if a graph is traversable?
Use your skill and judgement to match the sets of random data.
This problem challenges you to sketch curves with different properties.
Some treasure has been hidden in a three-dimensional grid! Can you work out a strategy to find it as efficiently as possible?
If I tell you two sides of a right-angled triangle, you can easily work out the third. But what if the angle between the two sides is not a right angle?
