Question

If 573xy is divisible by 90 then find the value of x+y​

Answer 1

Answer:

Step-by-step explanation:

90 = 2×5×9

573xy is divisible by 90, then 573xy is divisible by 5, then y is either 0 OR 5.

573xy is divisible by 90, then 573xy is divisible by 2, then y is even and Since 5 is not even then y = 0.

573x0 is divisible by 90, then 573x0 is divisible by 9, then 5 + 7 + 3 + x + 0 is divisible by 9, then x = 3.

Finally x + y = 3 + 0 = 3.

Answer 2

Answer:

3

Step-by-step explanation:

since  573xy is divisible by 90 then    last digit  y = 0

since  573x0 is divisible by 90 then  sum of digits divisible by 9

5+7+3+x+0   is divisible by 9

15 + x is divisible by 9

so x = 3

then x+ y = 3+ 0 = 3