LCM is Least Common Multiple of 2 or more numbers. So, LCM of 1 number i.e. 18 is not defined.
Similarly, HCF is Highest Common Factor of 2 or more numbers. So, HCF of 1 number i.e. 3 is not defined.
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18 = 2 * 3 * 370 = 2 * 5 * 7Thus:LCM = 2*3*3*5*7 = 630HCF = 2
The GCF is 3. The LCM is 120.
In these types of problems, the numbers can also be the answer. 6 and 72 have a GCF of 6 and an LCM of 72. Since the product of the GCF and LCM of two numbers is the same as the product of the numbers, you could also use another factor pair of 432, like 18 and 24.
The HCF is: 2The LCM is: 2,520
hcf = 42, lcm = 84.