And there's a new Year 4 now. They have their own blog too, though we often look to this one for inspiration.
Thank you to everyone who contributed, or visited, or commented on this one. It will stay here as a record of a fantastic year!
@Simon_Gregg good one! You can propose a latin square with no colour repetition on the diagonals
— Daniel Ruiz Aguilera (@druizaguilera) June 26, 2014
So... diagonals...
@tocamates @druizaguilera @Simon_Gregg we're talking diagonal squares here! Actually you can go MUCH further: http://t.co/jpK4ckkIAL
— theoremoftheday (@theoremoftheday) June 26, 2014
So, now for something much harder.... Euler squares! (We've met Mr Euler before!)