Question

1. If a number 573 xy is divisible by 90, then
what is the value of x + y?
A. 6
B. 9
C. 3
D. 8​

Answer 1

Answer:

B.9

Step-by-step explanation:

573xy is divisible by,

90

=2×3×3×5

so, y has to be either 5 or 0

and (x+y) has to be divisible by 3×3.

now, y can not be 5 then it will not be divisible by 2.

therefore, y=0

so, now

X is divisible by 9

so in option b we see the number 9

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