GCSE · Integers, powers & roots

HCF and LCMExam-style questions

What highest common factor and lowest common multiple actually mean, how prime factors give both (lowest powers vs highest powers), and how to spot which one a word problem is asking for.

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14 questions · GCSE (Higher) level · mark scheme and worked solution on each · no sign-up to try

DifficultyAllLevel 1Level 2Level 3Level 4Level 5
  1. 1
    Find the highest common factor (HCF) of 1212 and 1818.
    Level 1 · 2 marksTry it
  2. 2
    Find the lowest common multiple (LCM) of 66 and 88.
    Level 1 · 2 marksTry it