Răspuns :
m+pe+pr=721
m+pe=395
m+pr=550
395+pr=721
pr=721-395
pr=326 prune
pe+550=721
pe=721-550
pe=171 pere
m+171=395
m=395-171=224 mere
m+pe=395
m+pr=550
395+pr=721
pr=721-395
pr=326 prune
pe+550=721
pe=721-550
pe=171 pere
m+171=395
m=395-171=224 mere