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Prime Factors, HCF and LCM

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Question 8
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648=23×34 648 = 2^3 \times 3^4 648=23×34 540=22×33×5 540 = 2^2 \times 3^3 \times 5 540=22×33×5
a.

Write down the highest common factor (HCF) of 648 and 540.

[1]
b.

Find the lowest common multiple (LCM) of 648 and 540.

[2]
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Prime Factors, HCF and LCM Questions

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

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

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