Răspuns:
10101[tex](_{2} )[/tex] = 1 x [tex]2^{4}[/tex] + 0 x [tex]2^{3}[/tex] + 1 x [tex]2^{2}[/tex] + 0 x [tex]2^{1}[/tex] + 1 x [tex]2^{0}[/tex] = 16 + 0 + 4 + 0 + 1 = 21[tex](_{10})[/tex]
