a) Go to this Video: https://www.mathsgenie.co.uk/HCFLCM.php

Don't just play the video and watch. Pause it at the start of each question and try the question. Don't worry if you struggle - have a go. Then watch the explanation. Did you do it a different way? Did you get the right answer? Move on to the next question.

b) Try these questions, if you don't have time for them all, try 3 easier ones, 3 medium and 3 difficult ones. Mark your answers