9
obviously, its highest common factor is the number itself. so the answer here is 90.
90
The HCF is: 90
The highest common factor (HCF) is 15.
210 and 90's highest common factor is 30.
The GCF of 27 and 90 is 9.
95 and 90's highest common factor is five.
90 and 180, among others.
The Greatest Common Factor (GCF) is: 18
6.
10