**(5) Find the difference between the greatest and the least 5-digit number that can be written using the digits 6, 2, 7, 4, 3 each only once**

We have been provided with 5 digits **6,2,7,4,3** and these digits should not be repeated.**Greatest 5 digit number possible: 76432Least 5 digit number possible: 23467**

Difference between greatest and the least number:

**Hence, 52965 is our answer**