To determine the Highest Common Factor (HCF) of the numbers 15, 30, and 45, we can list the factors of each number and then find the largest factor that they all share.
Factors:
- Factors of 15: 1, 3, 5, 15
- Factors of 30: 1, 2, 3, 5, 6, 10, 15, 30
- Factors of 45: 1, 3, 5, 9, 15
Now, let's find the common factors:
- Common factors of 15, 30, and 45: 1, 3, 5, 15
The largest of these common factors is 15.
Therefore, the HCF of 15, 30, and 45 is 15.
In full: The Highest Common Factor of 15, 30, and 45 is 15.
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