下列哪个二进制数转换成十进制数后为26？
答案解析
A. 11001 = 1*2^4 + 1*2^3 + 0*2^2 + 0*2^1 + 1*2^0 = 16 + 8 + 1 = 25；B. 11010 = 1*2^4 + 1*2^3 + 0*2^2 + 1*2^1 + 0*2^0 = 16 + 8 + 2 = 26；C. 10110 = 1*2^4 + 0*2^3 + 1*2^2 + 1*2^1 + 0*2^0 = 16 + 4 + 2 = 22；D. 10011 = 1*2^4 + 0*2^3 + 0*2^2 + 1*2^1 + 1*2^0 = 16 + 2 + 1 = 19。因此B选项正确
正确答案：B