How to do something cool……………..
Select a four digit number. All the digits have to be different. Make the highest and lowest possible number from those numbers, for E.G. 9543 and 3459.
Now subtract the lower number from the higher number continue this process with the product from the previous sum. Do this until you get the number 6174 in order not just the digits. Here is a proper example.
8643-3468=5175
7551-1557=5994
9954-4599=5355
5553-3555=1998
9981-1899=8082
8820-0288=8532
8532-2358=6174
Jimbob 