Henry Ernest Dudeney/Puzzles and Curious Problems/88 - Digital Progression

by : $88$

 * Digital Progression
 * If you arrange the nine digits in three numbers thus, $147$, $258$, $369$,
 * they have a common difference of $111$ and are therefore in arithmetic progression.


 * Can you find $4$ ways of rearranging the $9$ digits so that in each case the number shall have a common difference,
 * and the middle number be in every case the same?