You cannot. The numbers 2 and 12 have hcf = 2 and LCM = 12 The numbers 4 and 6 also have hcf = 2 and LCM = 12 So if you just knew the hcf and LCM you would not know which of the two was the required pair.
The LCM is: 84
The GCF is 3.
The LCM is 1764.
factors of 8: 1, 2, 4, 8 factors of 18: 1, 2, 3, 6, 9, 18 HCF: 2
hcf = 42, lcm = 84.
HCF = 3... LCM = 18 !
LCM = product/HCF; HCF is 6 so LCM = 12 x 42 = 504
6
84 and 14, respectively.
The LCM is 126.
The LCM of 18 and 42 is 126.126
LCM(21, 42, 18) = 126
18 and 3
3 and 18 do.
LCM=18=2*32 HCF(guess that is what u meant, highest common factor)=3 Possibilities: 3 and 18, 6 and 9, three or all of the numbers together. Note: 3 and 6 gives a LCM of 6 3 and 9 gives a LCM of 9 6 and 18 gives a HCF of 6 9 and 18 gives a HCF of 9 Three or four out of the numbers (3,6,9 and 18) will give you LCM of 18 and HCF of 3 as well.
The LCM is 9324.