The highest common factor is the greatest number which both numbers can divide by evenly. In this case, the greatest number 40 can divide by is 40. 80 can also divide by 40, and so this is a common factor. As no numbers greater than 40 will be able to divide 40 evenly, the hcf of 40 and 80 is 40.
It is 10
2 x 2 x 2 x 5 ---- 40
The GCF is 5.
The GCF is 10.
The HCF of 40 & 12 is... 4
The hcf of 45 and 40 is 5.
HCF(40, 63) = 1
The HCF of the numbers 40 and 44 is 4.
The GCF is 16.
The GCF is 8.
The HCF of the numbers 18 and 40 is 2.
The GCF is 10.