Problems & Puzzles: Puzzles Puzzle 259. Not dividing any pandigital Rodolfo Kurchan recently asked to me the following question:
After I solved his question I asked to him in return:
Q1. Can you solve both questions without considering an exhaustive test of all the pandigital numbers? Q2. Redo the exercise with the 9digits pandigital (zerofree) numbers? _______ Solution: Faride Firoozbakht and Patrick de Geest sent contributions to this puzzle. Faride solved the Kurchan's original question for pandigital numbers the 10 digits and for zerofree pandigital numbers of 9 digits: 100 and 10, respectively. Faride and Patrick de Geest found the primesolutions to the Rivera's question but not satisfying the condition of the puzzle (not testing ALL the pandigitals in any case). So I will not show them yet. ***





