Question

explain HCF and LCM of 84 and 42 using prime factorisation​

Answer 1

Answer:

42 is the HCF and 84 is the LCM

Step-by-step explanation:

In HCF we have to find their factors separately and then cross the same factors and then multiply all the factors which are left and the answer comes easily.In LCM we have to find the factors in the same column and then multiply all the factors without crossing same factors and the answer comes easily.So do these easily and do some complex questions of this type.