Question

Find all possible values of h for which the number 7h3 is divisible by 3. Also, write all the possible numbers.  ​

Answer 1

Find the sum of digit
Given number
7x3

Sum of digit
7x3=7+x+3


=10+x


Find the possible values of
x

The number
7x3
is divisible by
3

We know that sum of digits of the number is divisible by
3
then the number is divisible by
3

sum of the digits is
10+x
is divisible by
3
if value of x can be
2,5,8


∴
The numbers can be
723,753,783
is divisible by
3
 The number can be
723,753,783
is divisible by
3