You would have to be a pair of numbers. 6 and 36 would work, as would 12 and 18.
The GCF is 6.
Gcf:36 lcm:12
The LCM of 36, 54 and 60 is 540. The GCF is 6.
12 and 18
As written, no numbers satisfy those conditions. 6 and 36 have a GCF of 6 and an LCM of 36.
12 and 18
The LCM can't be less than the GCF. 12 and 18 have a GCF of 6 and an LCM of 36.
6 and 72 respectively
If you mean 12 and 18 then they are 6 and 36 respectively
You need at least two numbers. 18 and 36 among others.
This one doesn't work. The LCM of 6 and either 32 or 96 is 96, but the GCF is 2.
HCF(30, 36, 42) = 6 LCM(30, 36, 42) = 1260