One face of a regular tetrahedron is painted blue and each of the remaining faces are painted using one of the colours red, green or yellow. How many different possibilities are there?
Is there an efficient way to work out how many factors a large number has?
After some matches were played, most of the information in the table containing the results of the games was accidentally deleted. What was the score in each match played?
How many right-angled triangles are there with sides that are all integers less than 100 units?
Five numbers added together in pairs produce: 0, 2, 4, 4, 6, 8, 9, 11, 13, 15 What are the five numbers?
You are only given the three midpoints of the sides of a triangle. How can you construct the original triangle?