Answer:5
Step-by-step explanation:
You will take 75 divided by 6 and you will get 12.5 so you will round up to 13
5/12 - 4/5 = -23/60. You can't simplify -23/60. Hope this is right
There's 9 choices for the first digit and 4 choices for the last digit. The number of choices for the 2nd and 3rd digits is 90 if 2 numbers are different. or 100 if duplicates are allowed.
If duplicates are allowed the answer is 9 * 100 * 4 = 3600 possible numbers.
