The factors of 15 are: 1, 3, 5, 15
The factors of 40 are: 1, 2, 4, 5, 8, 10, 20, 40
The common factors are: 1, 5
The highest common is 2
Highest common factor is 7.
The Highest Common Factor is: 4
The Highest Common Factor is: 9
The highest common factor is: 20
The highest common factor is 7.
The highest common factor is 35.
The highest common factor is 7.
The highest common factor (HCF) is 12.
The highest common factor is 3.
7The highest common factor is 7
7 is the greatest common factor of 14 and 21.