Proof Sorters

Nrich – IFF

From Nrich, try this Interactive Proof Sorter example which works on any device.

There are several more examples you can try:

• Nrich – The Quadratic Formula
• Nrich – Sum of an Arithmetic Sequence
• Nrich – Geometric Sequence
• Nrich – the Square Root of 2 Is Irrational (electronic version)
• Nrich – Curve Fitter a proof by contradiction, related problem Curve Fitter
• Underground Maths Proving the laws of logarithms