Determine the total number of 8-digit base ten positive integers such that the sum of the four leftmost digits is equal to precisely 15 more than the sum of four rightmost digits.

*** Assume non leading zero for each of the numbers.

(In reply to Solution (barring errors) by Jer)

There's a typo in the first product: it should be 519 rather than 591.

Posted by Charlie on 2015-09-28 16:02:04