18 = 2 x 3 x 3
99 = 3 x 3 x 11
So hcf = 3 x 3 = 9
The HCF of 99 is 99. But it's a factor as opposed to a common factor because there's only one number.
hcf(18, 30) = 6.
9
HCF = 3... LCM = 18 !
The GCF is 18.
The GCF is 3.
The GCF is 18.
The HCF of the numbers 18 and 40 is 2.
The GCF is 9.
6 is the HCF of 18 & 48
The GCF is 6.
The HCF is 18