Henry Ernest Dudeney/Puzzles and Curious Problems/20 - Boys and Girls

by : $20$

 * Boys and Girls
 * Nine boys and three girls agreed to share equally their pocket-money.
 * every boy gave an equal sum to every girl,
 * and every girl gave another equal sum to every boy.
 * Every child then possessed exactly the same amount.


 * What was the smallest possible amount that each then possessed?