1.1 Proof by Contradiction
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Use proof by contradiction to show that there exist no integers m m\,m and n n\,n for which 21m+14n=521m + 14n = 521m+14n=5.

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1.1 Proof by Contradiction Questions

Practise Edexcel A Level Maths 1.1 Proof by Contradiction with exam-style questions for A Level Maths. 100 questions, matched to the Edexcel A Level Maths (9MA0) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.

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1.1 Proof by Contradiction Questions

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