4MA1/1F Jun 2021, Question 13: HCF and LCM
Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 1F (Foundation) · Calculator · 3 marks
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The question, in short
Buses to the hospital leave every 16 minutes and to the college every 20 minutes, both at 9 am. Find the next time a hospital bus and a college bus leave together.
Summarised in our own words. Use the official paper for the exact wording and any diagrams.
Solution · 3 marks
- 1List multiples of 16: 16, 32, 48, 64, 80
- 2List multiples of 20: 20, 40, 60, 80
- 3The lowest common multiple is 80
- 480 minutes after 9 am is 10:20
Answer10:20
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