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Christian Lawson-Perfect 2 years, 1 month ago
Saved a checkpoint:
The naive approach is to write out the times tables for each number, so I've put that in the advice.
I've reworded "$a$ and $b$ are coprime" to "$a$ and $b$ have no factors in common", which is hopefully a bit easier to agree with if you're not good at spotting primes.
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This question is used in the following exams:
- trial run by Lesley Davis in Lesley's workspace.
- Divisibility and factors of integers by Christian Lawson-Perfect in Transition to university.
- maths practice-revision by David Martin in David's workspace.
- Nick's copy of Divisibility and factors of integers by Nick Walker in Nick's workspace.
- Blathnaid's copy of Nick's copy of Divisibility and factors of integers by Blathnaid Sheridan in Blathnaid's workspace.
- MATH1601 Quiz 1 by Blathnaid Sheridan in Blathnaid's workspace.
- Divisibility and factors of integers by Simon Thomas in Foundation mathematics.