using long division method find the hcf of 20 80 128
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20 = 2 * 2 *5
80 = 2*2*2*2*5
128 = 2*2*2*2*2*2*2
So hcf is height common factor
2*2 = 4 ans
80 = 2*2*2*2*5
128 = 2*2*2*2*2*2*2
So hcf is height common factor
2*2 = 4 ans
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