- #1
greg9381
- 5
- 0
Any ideas on this? I googled it and got only answers inolving Excel, C++, etc...
A formula for finding the digit sum of a 2-digit number, or only a 3-digit number, would also be interesting.
I thought I had a start with this: For a 2-digit number xy, the sum of the digits = [itex](\frac{x}{10})\lfloor[/itex] + something. But I don't know how to isolate y.
A formula for finding the digit sum of a 2-digit number, or only a 3-digit number, would also be interesting.
I thought I had a start with this: For a 2-digit number xy, the sum of the digits = [itex](\frac{x}{10})\lfloor[/itex] + something. But I don't know how to isolate y.