Skip to content

Course home

Prime Factors, HCF and LCM

Prime Factors, HCF and LCM

MediumHard
1234567891011121314151617181920212223242526272829303132333435363738
Question 32

Light A flashes every 8 seconds.

Light B flashes every 20 seconds.

Both lights flash at the same time.

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

[3]
Markscheme

Prime Factors, HCF and LCM Questions

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

59 exam-style questions on Edexcel GCSE Maths Prime Factors, HCF and LCM. Each one has a worked solution and a mark scheme showing where the marks go.

Question bank