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





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  • By: guest on 01 Jun 2017 05.47 pm
    90 = 10 x 9 Clearly, 653xy is divisible by 10, so y = 0 Now, 653x0 is divisible by 9. So, (6 + 5 + 3 + x + 0) = (14 + x) is divisible by 9. So, x = 4. Hence, (x + y) = (4 + 0) = 4.
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