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Question
Using the prime factor method, find the H.C.F. of 40, 60 and 80
Sum
Solution
Prime factor of 40 = 2 x 2 x 2 x 5
Prime factor of 60 = 2 x 2 x 3 x 5
Prime factor of 80 = 2 x 2 x 2 x 2 x 5
Common prime factor = 2 x 2 x 5
H.C.F. of 40, 60 and 80 = 2 x 2 x 5 = 20
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Prime Factorization for HCF and LCM
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