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Edexcel IGCSE Math A Higher 1.4 E Highest Common Factors Hcf and Lowest Common Questions

Practise HCF and LCM questions by comparing factors, listing multiples or using prime-power exponents from factorised numbers.

Syllabus
First assessment 2018
Course
Math A 4MA1
Level
Higher

Exam points

  • Find an HCF by comparing common factors or choosing smaller prime-power exponents.
  • Find an LCM by listing multiples or using the largest prime-power exponents.
  • Give HCF or LCM answers as prime-power products when A and B are factorised.

Edexcel IGCSE Math A Higher 1.4 E Highest Common Factors Hcf and Lowest Common Questions question 1

[Maximum number: 1]

12P=33×52×712 P=3^{3} \times 5^{2} \times 7

Q=32×5×72Q=3^{2} \times 5 \times 7^{2}

Write down the highest common factor (HCF) of P and Q

P=33×52×7Q=32×5×72\begin{aligned} & P=3^{3} \times 5^{2} \times 7 \\ & Q=3^{2} \times 5 \times 7^{2} \end{aligned}
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