Question

The binary number $10111$ is equivalent to the decimal number

• A. 19
• B. 31
• C. 23
• D. 22

Answer 1

Answer: (C)

Hence, $(10111)B=1\times 2^4+0\times 2^3+1\times 2^2$
$+1\times 2^1+1\times 2^0$
$=16+0+4+2+1=23.$