Question

Dintr-un hotel din statiunea Mamaia,au plecat intr-o zi 18 persoane.Cate camere s-au eliberat,stiind ca fiecare camera ocupata de cate 2 persoane？Calculeaza prin scadere repetata.

Answer 1

18-2=16
16-2=14
14-2=12
12-2=10
10-2=8
8-2=6
6-2=4
4-2=2
2-2=0
R=9 camere

Answer 2

2+2+2+2+2+2+2+2+2+2++2+2+2++2+2+2+2+2+2+2++2+2+²+2+2+2+2+2+2+2+2+⅔+2+2+2+2++2+2+2+²2+2++²⅔+2+2+2+2+2++2+2+2+2++2+2+2++2+2+@+3++2+2+2+2!$;4+2++2++2++2+2+2+1++2+2+2+2++2+2+.2+2