How to do HCF
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Yogita Ingle 7 years, 7 months ago
HCF of numbers can also be found by prime factorization of the numbers.
Example: Find the HCF of 30 and 42.
Prime factors of 30 = 2 x 3 x 5
Prime factors of 42 = 2 x 3 x 7
Common factor of 30 and 42 = 2 x 3 = 6
Therefore, Highest common factor (H.C.F) of 30 and 42 = 56
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