Henry Ernest Dudeney/Modern Puzzles/54 - The Two Additions

by : $54$

 * The Two Additions
 * Can you arrange the following figures into two groups of $4$ figures each so that each group shall add to the same sum?
 * $1 \ 2 \ 3 \ 4 \ 5 \ 7 \ 8 \ 9$


 * If you were allowed to reverse the $9$ so as to change it into the missing $6$ it would be very easy.
 * For example, $1, 2, 7, 8$ and $3, 4, 5, 6$ add up to $18$ in both cases.
 * ''But you are not allowed to make any such reversal.