Runner A completes a lap of a track every 45 seconds.
Runner B completes a lap of the same track every 60 seconds.
They both start a lap at the same time from the start line.
Work out how many seconds it will take for both runners to cross the start line at the same time again.
Practise Edexcel GCSE Maths Prime Factors, HCF and LCM with exam-style questions for Foundation and Higher tier. 59 questions, matched to the Edexcel GCSE Maths (1MA1) 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.