Digital sumComputer Science Level 3
For example,for \(29953\) the digital root is \(29953 \rightarrow 28\rightarrow 10\rightarrow 1\).
Let \(S\) be the number of all positive integers less than one million that have a digital root of \(1\). What is the digital root of \(S\)?
Check out part 2 for a more challenging version