LCM & HCF Calculator
Enter two positive whole numbers to get their exact HCF (GCD) and LCM, computed with the Euclidean algorithm.
FAQs
How is this calculated exactly?
HCF is found with the Euclidean algorithm (repeatedly replacing the larger number with the remainder of dividing it by the smaller, until the remainder is 0). LCM is then HCF's natural counterpart: (first number × second number) ÷ HCF — both are exact, not approximated.
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