If you mean 66, 12, 11 and 43 then the highest common factor is 1 because 11 and 43 are prime numbers.
95 and 115's highest common factor is five.
The GCF is 2.
64 and 40's highest common factor is eight.
The GCF is 7.
there is no highest common factor
The highest common is 2
Highest common factor is 7.
The Highest Common Factor is: 9
The Highest Common Factor is: 4
The highest common factor is 7.
The highest common factor is 7.
The highest common factor is 35.
The highest common factor is: 20
99 and 165's highest common factor is 33.
7The highest common factor is 7
The highest common factor (HCF) is 12.
The highest common factor is 3.