Question

Replace $*$ by a digit to make the number exactly divisible by $9$

$6702*$

Answer 1

A number is divisible by $9$ if the sum of its digits is divisible by $9$.

$6702*$$=$$6+7+0+2+*=15+*$

Observe that when $*$$=$$3$, then the sum of its digits is divisible by $9$

$\therefore 15+3=18$

Hence, the $*$ will replace by $3$.