Find the difference between the greatest 4 digit number and the smallest 3 digit number formed using the digits 5,3,4 and 0 without repetition of digits.

The correct option is A 5,085
If the given digits are arranged in the descending order, we get the greatest number.
So, greatest 4-digit number formed using the given digits = 5430

If the given digits are arranged in the ascending order, we get the smallest number.
Here, 0 is the smallest number. So, 0345 = 345 will be the smallest possible number.

Smallest 3-digit number formed using the given digits = 345

The difference between them
= 5430 - 345
= 5,085