Answer: The number is divisible by 3. Why? Add the digits in a number together, continuing onwards until you get a 1 digit number. If this number is a multiple of 3 (3, 6, or 9), it means the original number is as well. Try it with this number. 7 + 5 = 12 1 + 2 = 3 3 is a multiple of 3 (3*1), so 75 is divisible by 3. Check: 75/3 = 25 25*3 = 75
