Add any two digit number to the number result in subtraction
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A two digit number represented by digit A and B is equal to :10a+b the sum of these digits is a+b.the new number as referenced In the question is (10a+b )-(a+b),or10a+b-a-b which simplies to 9a must be evenly divisible by at least the following numbers 1,3,9,A,9A
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