Henry Ernest Dudeney/Modern Puzzles/51 - An Exceptional Number/Solution

by : $51$

 * An Exceptional Number

Solution
We have:
 * $1 \, 3 \, 4 \, 5 \, 2$

as:
 * $13 \times 4 = 52$

It remains to be shown that there are no more.

This could be implemented by means of a computer search.