0
To find HCF & LCM of two or more numbers.
Divide by prime numbers.
We note in this case, 12, & 30 are both even numbers, so they will divide by '2'.
Hence
2)12
2)6
3)3 = 1
&
2)30
3)15
5)5 = 1
First reduce both numberx to '1'.
Second;ly, we note that '2' & '3' bo appear in each set of numbers.
Hence 2 x 3 = 6 is the HCF
Having made this multiplication we are left with a '2' in the twelve and a '5' in the thirty..
Hence 6(HCF) X 2 X 5 = 60 the LCM.
Done!!!!
Hope that helps!!!!
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