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Answered 2011-09-19 17:50:36

hcf is 100

lcm is 4000

500 = 22 x 53

800 = 25 x 52

hcf = 22 x 52 = 100

lcm = 25 x 53 = 4000

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LCM is 20 and the hcf is 10



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