Question

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

• A. $19$
• B. $31$
• C. $23$
• D. $22$

Answer 1

The correct option is C $23$

Here, ${\left(10111\right)}_B=1\times 2^4+0\times 2^3+1\times 2^2+1\times 2^1+1\times 2^0$

$=16+0+4+2+1=23$