Question

2z3 is divisible by 9. So, find out the value of z

Answer 1

Given:

2z3 is divisible by 9

To find:

The value of z

Solution:

As per the divisibility rule of 9 the sum of the digits of the given number must be divisible by 9

we have given the number 2z3

sum of the digits is given by

• 2+z+3
• 5+z

so 5+z must be the multiple of 9

as z is a digit of the number so it can be a single digit number only

so the sum must be 9

• 5+z = 9
• z = 4

the value of z is 4