Răspuns:
a ) x poate fi : 1,2,3,4,5,6,7,8,9,
y poate fi : 0,5
x1993y este egal cu : 119930,119935,219930,219935,319930,319935,419930,419935,519930,519935,619930,619935,719930,719935,819930,819935,919930,919935
b) 35ab <=> a poate fi : 1 ,2,3,4,5,6,7,8,9,0
b poate fi 0 sau 5
35ab este egal cu
3510,3515,3520,3525,3530,3535,3540,3545,3550,3555,3560,3565,3570,3575,3580,3785,3590,3595,3500,3505