121(8) = 1*8²+2*8¹+1*8⁰ = 64+16+1 = 81(10)
212(6) = 2*6²+1*6¹+2*6⁰ = 72+6+2 = 80(10)
2112(3) = 2*3³+1*3²+1*3¹+2*3⁰ = 54+9+3+2 = 68(10)
1011101(2) = 1*2⁶+0*2⁵+1*2⁴+1*2³+1*2²+0*2¹+1*2⁰ = 64+16+8+4+1 = 93(10)
ответ: 1011101(2),121(8),212(6),2112(3)
