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1.1.4 Proof by contradiction (A-level only)

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Question 18

Use proof by contradiction to show that there exist no integers $x\,$ and $y\,$ such that $15 x + 20 y = 2$ .

[4]

Markscheme

1.1.4 Proof by contradiction (A-level only) Questions

A Level
Maths
1.1.4 Proof by contradiction (A-level only)

107 exam-style questions on OCR A Level Maths 1.1.4 Proof by contradiction (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

1.1.4 Proof by contradiction (A-level only)

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1.1.4 Proof by contradiction (A-level only)

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Question 18

Use proof by contradiction to show that there exist no integers $x\,$ and $y\,$ such that $15 x + 20 y = 2$ .

[4]

Markscheme

1.1.4 Proof by contradiction (A-level only) Questions

A Level
Maths
1.1.4 Proof by contradiction (A-level only)

107 exam-style questions on OCR A Level Maths 1.1.4 Proof by contradiction (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.