Question

What is the octal equivalent of a binary number $111001$?

• A. $69$
• B. $70$
• C. $71$
• D. $82$

Answer 1

The correct option is C

$71$

Explanation for the correct option:

Given binary number is $111001$.

Group all the digits in sets of three starting from the right. we get

$111,001$

We know that the binary number $001$ is octal $1$, and the binary number $111$is octal $7$.

So, ${\left(111001\right)}_2={\left(71\right)}_8$

Hence, the correct option is $\left(C\right)$.