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 Try a notation structure
That problem of the 4 x 4 grid (words) was not classified as a "trick", because if it was, everybody would see at once what to do, since there are a very few tricks to try.
But in this one it is stated tacitly : "NO TRICKS !!!!!"
Again : ITīS A MATH SOLUTION !!!!!!!!!!!!
Posted by pcbouhid
on 2005-07-01 15:19:06