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Prime Factors, HCF and LCM

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Question 9
73%

Alarm A beeps every 15 seconds.

Alarm B beeps every 25 seconds.

Both alarms beep at the same time.

Work out how long it will take for both alarms to beep at the same time again.

[3]

Prime Factors, HCF and LCM Questions

  1. GCSE
  2. /Maths
  3. /Prime Factors, HCF and LCM

Practise OCR GCSE Maths Prime Factors, HCF and LCM with exam-style questions for Foundation and Higher tier. 59 questions, matched to the OCR GCSE Maths (J560) specification and written in the written papers 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.

Question bank