I've seen a 7x7x7 solved by my friend. But it costs over $100, so I'll stick with my 3x3x3. Can't wait for an Australian Competition. As for the mathematical application to the cube, someone said it could be solved using a certain branch of maths. For me, I just use algorithms, I use over 100...
Nice, I know of someone from my school who got state ranks for both 3U(1st i think) and 2U(2nd 3rd?) and didn't do 4U because of it, his UAI was 99.8 wowers.
Thought so....
The diagram shows a triangular piece of land ABC with dimensions
AB = c metres, AC = b metres and BC = a metres, where a ≤ b ≤ c.
The owner of the land wants to build a straight fence to divide the land into two
pieces of equal area. Let S and T be points on AB and AC...