hcf and lcm

The lcm and hcf of 4.2,42,0.42and 0.042 is:

Your Answer

Initially multiply by 1000 each no so the numbers will be =4200,42000,420,42
LCM (4200,42000,420,42) = 42000     
we multiplied the number by 1000 so answer should be divided by 1000 implies lcm = 42
HCF of rational number = HCF of numerator / lcm of numerator = 0.042 

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