Mathematics for IGCSE & O level - Number (Section 1 - No. 38)
The HCF of two numbers is 3. The LCM of the same two numbers is 18. If one number is 6, what is the other number?
3
6
9
18
Explanation
Using the formula, (HCF * LCM) = (Number 1 * Number 2) => (3 * 18) = (6 * x) => 54 = 6x => x = 9.
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