The highest common factor (HCF) of two numbers is the largest number that is a factor of both numbers. For example, the highest common factor (HCF) of \({12}\) and ...
The factors of \({6}\) are \({1}\), \({2}\), \({3}\) and \({6}\). The factors of \({10}\) are \({1}\), \({2}\), \({5}\) and \({10}\).