Question

Fill in the blank with smallest digit to make $725$…$26$ divisible by $9.$

Answer 1

Since as we know that sum of all digits of a number is divisible by $9$ then the number is also divisible by $9.$

The sum of all digits of a number $725$$x$$26$ is $7+2+5+x+2+6=22+x$ , $22+x$is divisible by $9$ where $x$ is smallest digit at blank space.

when $x=5$ then $22+5=27$which is divisible by $9.$

Hence , the smallest digit to be placed is blank space $=5$of number $725$…$26$ divisible by $9.$