What is the perimeter of this triangle?
Solution revealed: 02 Jul 2021
Freddy the fly is wondering about his chances of landing closest to point B...
Solution revealed: 25 Jun 2021
For which values of n is this expression an integer?
Solution has been revealed
Would you trust this housemate?
When is this expression prime?
It's not just 30-60 and 45-45 right-angled triangles that are special! What about a 15-75 right-angled triangle?
Your challenge is to determine four prime factors of a very large number using just pencil and paper methods.
Can Freddy visit every square on the chessboard?
What is the probability that the eggs and eggcups match?
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