Question

Test whether the following numbers are divisible by $6$
$75642$

Answer 1

$75642$ is divisible by $6$ if it is divisible by both $2$ and $3$

(1) digit is even $\therefore$ it is divisible by $2$

(2) $7+5+6+4+2=24$

and $24$ is divisible by $3$ $\therefore 75642$ is divisible by$3$

$\therefore 75642$ is divisible by $6$.