Let the 5-digit integer = abcde
Hint : abcde = 10000 a + 1000 b + 100 c + ....
bluffmaster.roy.007, I've seen all your 50 posts and found out that very few of the posts contained your work or idea. Have you tried to solve those problems?
1. If no, then you can try it first by yourself
2. If yes, then you can post your work. Show us what you've done and tell us on which part you are having difficulties with. Or at least you can post what your idea is, in case your work is still messy (maybe).
If you have tried, then you must have done SOMETHING. Post that SOMETHING. It really helps us a lot if you post your work or your idea, even just a little bit. Or maybe you don't understand what the question is. Then, you can state which part of the question you don't understand. Give us HINT where to start to help you.
I really don't mean being rude. It just my suggestion because I think it's better.