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

WBJEEWBJEE 2008Semiconductor Electronics: Materials Devices and Simple Circuits

Solution:

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