If 21y5 is a multiple of 9,when y is a digit,what is the value of y?

If 31z5 is a multiple of 9,where z is a digit,what is the value of z?You will find that there are two answers for the last problem.Why is this so?

If 24x is a multiple of 3,where x is a digit,what is the value of x?

IF 31z5 is a multiple of 3,where z is a digit, what might be the value of z?

If 31 a5 is a multiple of 3,where a is a digit,what could be the values of a?

If 7 y = ( 35)/( y) , then find the value of y .

If [1X 2Y 6Z] is a number divisible by 9,then the least value of X+Y+Z is:

Draw the graph of the equation y - x = 2. Find from the graph (i) the value of y when x = 4 (ii) the value of x when y =-3

If (x-2,y+3)=(5,-6) , then find the values of x and y ?

Let p=2520, x=number of divisors of p which are multiple of 6, y=number of divisors of p which are multiple of 9, then

If (x+ y ,x-y}=( 3,1) find the value of x and y