If the LCM of 20 and 30 is 60. Find their HCF.
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The numbers 20 and 30 have the factors 2 and 5 in common. Next, multiply the common factors to find the GCF. If there is only one common factor, there is no need to multiply. The GCF of 20 and 30 is 10.
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Answer:
20 = 2*2*5
30 =2*3*5
So, HCF = 2*5 = 10
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