Question

Find the remainder when $51439786$ is divided by $3$. Do this without performing actual division

• A. $0$
• B. $1$
• C. $2$
• D. None of the above

Answer 1

The correct option is B $1$

$5+1+4+3+9+7+8+6=43=42+1$
The sum of digits is not a multiple of $3$. To make it a multiple of $3$, we subtract the number by $1$.
i.e, the remainder is $1$.