Skip to content

Course home

Prime Factors, HCF and LCM

Prime Factors, HCF and LCM

EasyMedium
12345678910
Question 8
51%

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. IGCSE
  2. /Maths
  3. /Prime Factors, HCF and LCM

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

Question bank