If the number 653 xy is divisible by 90, then (x + y) = ?

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to divisible by 90 it should be divisible by 9. hence the divisibility rule for 9 is the sum of individual numbers must be divisibe by 9 =.> 6+5+3+x+y should be divisible by 9
As 6+3=9 it can be removed then x+y+5=9 or its divisible one 
hence x+y=4 is the least possible individual numbers

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