document.write( "Question 356934: If the 3 digit positive integer n = ABC = AB + BA + AC + CA + BC + CB, compute the largest possible value for n. (Note: A, B, C are single digits from 0 to 9) \n" ); document.write( "
Algebra.Com's Answer #254903 by robertb(5830)\"\" \"About 
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The values of A, B, C are guided by the equation \"26A+-+4B+-+7C+=+0\". We only need to consider i) odd values for B and even values for C, and
\n" ); document.write( "ii) even values for B and even values for C.
\n" ); document.write( "Only 3 ordered triples (A, B, C)will satisfy the constraint equation above:
\n" ); document.write( "(2,6,4), (1,3,2), and (3,9, 6). Therefore the largest n is 396.
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