To find a factor of 75, we need to determine which of the given numbers (4, 3, 9, 6) divides 75 evenly (without leaving a remainder).
- 4: 75 divided by 4 equals 18.75 (not a factor).
- 3: 75 divided by 3 equals 25 (this is a factor).
- 9: 75 divided by 9 equals approximately 8.33 (not a factor).
- 6: 75 divided by 6 equals 12.5 (not a factor).
The only number from the options that is a factor of 75 is 3.