Diagonal Differences
This Subtangent investigation looks at what happens if the numbers in opposite corners of a three by three square, placed on an eight by eight grid, are multiplied then their difference found. Using algebra, students may discover a general rule which applies to any three by three square placed on the grid. Students can extend…
Colouring Maps
This activity from Subtangent is based on the four colour theory, which is used by mapmakers. There is an interactive task which challenges students to colour a map using no more than four colours and ensuring that no two regions which share a border have the same colour. Further resources include examples of colouring maps…
5/5- Publication year: 2000 - 2009
- Interactive resource
Number Stairs
This Subtangent investigation looks at the total of the squares inside a stair shape. Initially students investigate the relationship of the totals of a three step stair and its position on a 10 by 10 grid. Using algebra, students may discover a general rule which applies to any stair on the grid. Students can extend this…