25 progressive Edexcel A-Level (9MA0) proof questions with full mark-scheme style worked solutions. What’s inside: Easy: disproof by counter-example, and short direct proofs by deduction. Medium: ...

If you don’t know what to do, do something. That’s one of my mottos when I teach math (and it’s probably good life advice too). Last year, I taught introductory analysis (basically calculus with the ...