jump to navigation

Problem of the Day #362: Digitally Odd Numbers March 15, 2012

Posted by Saketh in : potd , trackback

Suppose that $n$ is a five digit multiple of $5$, all of whose digits are odd. Suppose further than $\frac{n}{5}$ also has five odd digits. How many possible values of $n$ are there?


no comments yet - be the first?