# HCF LCM Prime Factorisation Higher GCSE Questions These

- Slides: 7

HCF & LCM – Prime Factorisation – Higher – GCSE Questions These questions are the same format as previous GCSE exams. COPY means they use the exact same numbers as the original GCSE question. Otherwise, they are clone questions using different numbers. The worksheets are provided in a variety of sizes.

Printing To print handouts from slides Select the slide from the left. Then click: File > Print > ‘Print Current Slide’ To print multiple slides Click on a section title to highlight all those slides, or press ‘Ctrl’ at the same time as selecting slides to highlight more than one. Then click: File > Print > ‘Print Selection’ To print double-sided handouts Highlight both slides before using ‘Print Selection’. Choose ‘Print on Both Sides’ and ‘Flip on Short Edge’.

GCSE 1 GCSE Edexcel Higher: June 2018 Paper 2, Q 2 (a) Find the lowest common multiple (LCM) of 30 and 54 1 Edexcel Higher: June 2018 Paper 2, Q 2 (a) Find the lowest common multiple (LCM) of 30 and 54 (2) A = 2 × 33 × 5 B = 23 × 32 × 52 (2) A = 2 × 33 × 5 (b) Write down the highest common factor (HCF) of A and B. B = 23 × 32 × 52 (b) Write down the highest common factor (HCF) of A and B. (1) (Total for Question 1 is 3 marks)

GCSE 1 Edexcel Higher: June 2018 Paper 2, Q 2 (a) Find the lowest common multiple (LCM) of 30 and 54 (2) A = 2 × 33 × 5 B = 23 × 32 × 52 (b) Write down the highest common factor (HCF) of A and B. (1) (Total for Question 1 is 3 marks)

GCSE 1 Edexcel Higher: June 2018 Paper 2, Q 2 (a) Find the lowest common multiple (LCM) of 30 and 54 30, 60, 90, 120, 150, 180, 210, 240, 270 54, 108, 162, 216, 270 OR 30: 2 × 3 × 5 54: 2 × 3 × 9 LCM = 2 × 3 × 5 × 9 = 270 (2) A = 2 × 33 × 5 B = 23 × 32 × 52 (b) Write down the highest common factor (HCF) of A and B. HCF = shared factors = 2 × 32 × 5 = 90 90 (1) (Total for Question 1 is 3 marks)

Questions? Comments? Suggestions? …or have you found a mistake!? Any feedback would be appreciated . Please feel free to email: tom@goteachmaths. co. uk