To determine which of the numbers (4, 3, 9, 6) is a factor of 75, we can check the divisibility of 75 by each number.
- 4: 75 ÷ 4 = 18.75 (not a factor)
- 3: 75 ÷ 3 = 25 (is a factor)
- 9: 75 ÷ 9 = 8.33 (not a factor)
- 6: 75 ÷ 6 = 12.5 (not a factor)
The only number that is a factor of 75 is 3.