cate 5 bomboane fiecarui coleg , raman 2 colegi fara a primi bomboane
cate 4 bomboane fiecarui coleg, raman 17 bomboane
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Cei 2 colegi ramasi fara bomboane in prima distribuire primesc cate 4 bomboane in a doua distribuire
2 × 4 = 8 bomboane au primit cei doi colegi
8 + 17 bomboane ramase din a doua distribuire = 25 bomboane
5 - 4 = 1 bomboana ⇒ diferenta dintre numarul bomboanelor distribuite
25 : 1 = 25 colegi au primit au primit cate 5 bomboane
25 + 2 colegi ce au ramas fara bomboane = 27 colegi
27 × 4 bomboane + 17 = 108 + 17 = 125 bomboane a cumparat
Verific: 125 : 5 = 25 colegi primesc cate 5 bomboane, iar 2 colegi nu primesc