It is not possible to give a sensible answer to this question. The highest common factor (HCF) refers to a factor that is COMMON to two or more numbers. You have only one number in the question!
HCF = 3... LCM = 18 !
The GCF is 3.
The GCF is 18.
The GCF is 9.
6 is the HCF of 18 & 48
The GCF is 6.
The HCF is 18
The hcf is 12
18
It is: 18
factors of 8: 1, 2, 4, 8 factors of 18: 1, 2, 3, 6, 9, 18 HCF: 2
The GCF/HCF of 54 and 504 is 18.