Find the LCM and HCF of 18, 15, and 54 by the prime factorization method.
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(HCF) of two or more given numbers is the highest (or greatest) of their common factors. It is also known as Greatest Common Divisor (GCD).
Let’s find the HCF by prime factorization method.
18 = 2 x 3 x 3
54 = 2 x 3 x 3 x 3
81 = 3 x 3 x 3 x 3
Multiply all the factors which appear in both the list. i.e 3 x 3 = 9
The HCF of 18, 54 and 81 is 9.
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