Taken from www.brainboxx.co.uk
- thanks to John Fewings.
This challenge is a practical challenge and it is worth printing out the pdf of this so you can have a hands on attempt. The pdf link can be found here
It is called the 25 Tiles Challenge. You have 25 tiles (5 each of 5 colours). You have to fit the tiles into the grid so that no column, no row and no diagonals have more than one tile of each colour.
Can you complete the challenge?? If so, stick the coloured tiles onto the 5x5 grid and bring it into school to show your teacher and myself.