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The HCF of any two numbers is the greatest number that divides both numbers without leaving any remainder.
For ex: HCF of 24 and 30
Factors of 24 = 1 , 2 , 3 , 4 , 6 , 8 , 12 , 24
Factors of 30 = 1 , 2, 3 , 5 , 6 , 10 , 15 , 30
Therefore , HCF of 24 and 30 = 6