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1.Fie x si y doua numere naturale. aflati [x;y]daca:
a) ( x;y)=12, x ori y=2160
b) (x;y)=18, x ori y=6480
2.Determinati cifra x,x egal taiat 0, in urmatoarele cazuri:
a) [x5 in baza zece;21]=105
b) [x0 in baza zece;16]=80
c) [x5 in baza zece;45]=225