First, we need to find the prime factors of each number:
39 = 3 * 13
42 = 2 * 3 * 7
60 = 2 * 2 * 3 * 5
To find the HCF, we need to identify the common prime factors:
HCF = 3
To find the LCM, we need to identify all prime factors, and take the highest power of each:
LCM = 2^2 * 3 * 5 * 7 * 13 = 5460
Therefore, the HCF of 39, 42 and 60 is 3, while the LCM is 5460.
Find the HCF and LCM of 39, 42 and 60. Use the product of prime factors method
2 answers
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