Without using any arithmetical symbols (+, -, *, /, or similar; other math symbols; decimal comma or periods; letters; even parentheses) or, in short, anything but the digits, build a number with the digits 1, 3, 5, 7 and 9, that is equal to a number built with the digits 2, 4, 6 and 8 (each digit used once and only once).
Note: This is not a trick. It was extracted from a book edited by Angela Dunn, a mathematician who gathered problems that appeared in many scientific periodical revues!
(In reply to Not a trick?
Maybe my comment about their work was misunderstood (the "perception" and "the computer program"), or, once again, the problem of the idiom.
And certainly, when I asked "are the solutions exausted ?", it implied that they had achieve the solution(s).
My mistake !!
Posted by pcbouhid
on 2005-06-30 23:13:03