The highest common factor (HCF) of 10 and 5 is 5.
Here's why:
The factors of a number are the numbers that divide into it exactly.
- Factors of 5: 1, 5
- Factors of 10: 1, 2, 5, 10
The common factors of 5 and 10 are the factors that appear in both lists. In this case, the common factors are 1 and 5.
The highest common factor is the largest of the common factors. Therefore, the HCF of 5 and 10 is 5.