lcm(9, 12) = 36;
hcf(9, 12) = 3.
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Least Common Multiple (LCM) for 9 12 is 36.
LCM of 8 and 9 and 12 is 72.
HCF of 3 means the numbers both have a prime factor of 3. LCM of 12 means that, between the numbers, there are factors of 2, 2 and 3. But these 2s cannot be shared, else the HCF would be greater. Therefore, the numbers will need to be 3 and 2x2x3, or 12.
Least Common Multiple (LCM) for 6 9 12 is 36.
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