Search by Topic

Filter by: Content type:
Stage:
Challenge level: Challenge Level:1 Challenge Level:2 Challenge Level:3

There are 3 results

Broad Topics > Using, Applying and Reasoning about Mathematics > Proof Sorting

problem icon

Iff

Stage: 4 and 5 Challenge Level: Challenge Level:2 Challenge Level:2

Take a triangular number, multiply it by 8 and add 1. What is special about your answer? Can you prove it?

problem icon

Kite in a Square

Stage: 4 Challenge Level: Challenge Level:2 Challenge Level:2

Can you make sense of the three methods to work out the area of the kite in the square?

problem icon

Proximity

Stage: 4 Challenge Level: Challenge Level:2 Challenge Level:2

We are given a regular icosahedron having three red vertices. Show that it has a vertex that has at least two red neighbours.