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.
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The LCM is the higher number. The LCM of 9 and 18 is 18.
The LCM of 54 and 24 is 216.The Least Common Multiple (LCM) for 54 24 is 216factoring24=2*2*2*354=2*3*3*3so LCM =2*2*2*3*3*3=216
The LCM is 18.
You need at least two numbers to find an LCM.
To find the HCF you first need to express the numbers as products of their prime factors. In this case we have: 18 = 2x3x3 70 = 2x5x7 The next step is to identify any common prime factors. In this case, both numbers have a 2 as a prime factor. Thus the HCF is 2. To find the LCM, you simply multiply the numbers together and divide by the hcf: 18x70/2 = 630 So the LCM is 360.