Use proof by contradiction to show that there exist no integers x x\,x and y y\,y for which 24x+16y=524x + 16y = 524x+16y=5.
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Markscheme
3.1.1 Proof (A-level only) Questions
107 exam-style questions on WJEC A Level Maths 3.1.1 Proof (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.