Question

pls answer.............

Answer 1

it can be 0, 3,6,9....as the multiple of 3 can be found out when the sum of the digits of the number is divisible by 3

Answer 2

Sum of digits = 3 + 1 + z + 5

                       = 9 + z.


Hence, 9 + z should be a multiple of 9.

When z = 0:

9 + 0 = 9(Divisible)

When z = 1:

9 + 1 = 10(Not Divisble)

When z = 3

9 + 1 = 12(Not Divisible)

When z = 6

9 + 1 = 15(Not divisible)

When z = 9

9 + 9 = 18(Divisible).


Hence the values of z = 0 or 9.


Hope this helps!