6 and 12
If the GCF of two numbers is 12 and the LCM is 24, the two numbers are 12 and 24.
The numbers are: 12 and 72
LCM is least common multiple of two or more numbers. LCM of 12 and 15 is 60.
12 and 15
5 and 12
12
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.
3 and 12
2 and 12
12 and 648
12 and 252
3 and 12