To have a HCF, you need at least 2 numbers. There is no HCF in just 1 number.
I have some options 14,15,19,16,21
The HCF is 5.
the HCF is 6
The HCF is 1
The HCF of 228 and 240 is 12.
The HCF of 16 & 33 is... 1
The HCF is 1.
The HCF is 14.
The HCF is 18
3.
The GCF is 2.