Question

if 31zis multiple of 9, where z is z digit, what is vaule of z ? you will find there are two answer for the for the last problem why is so​

Answer 1

Answer:

Step-by-step explanation:

The first ten multiples of 9 are 9, 18, 27, 36, 45, 54, 63, 72, 81, 90. For the tens places, note that the number 9 can be thought of as 0 tens and 9 ones so the tens place has a 0. The tens place of 18 is 1.

If the sum of the digits of a number is divisible by 9, then the number is divisible by 9. Some examples of numbers divisible by 9 are as follows. The number 51984 is divisible by 9 because the sum of its digits 5+1+9+8+4=27 is divisible by 9.

3+1+z=4+z divisible by 9

4+5=5=9

9 is divisible by 9

the value of z = 5