The Proving Ground, 2018 Edition

The Proving Ground, Jonny Griffiths, 2018 Edition, initially published by the Association of Teachers of Mathematics.

Forty problems, each to be tackled at Level 1, then Level 2, then Level 3.

All of these problems are simple to state and understand.

But here's the catch... twenty have been solved, and twenty haven't.

At least, that was the case back in 2018. Maybe mathematics has now moved on, so that more than twenty of the problems have been solved?

This eBook aims to offer a practical introduction to mathematical proof for the keen young mathematician.