>Too bad they don't teach children alternate numbering systems from age >5 on up. I suspect HEX and binary would be more natural then.... "They" do if you home school ! I learned quite a few common (and uncommon) number systems in my public school days, plus multiplication tables up through 19 x 19. (I'm a little rusty on the non-power-of-two ones these days, though ) Andy ================================================================== Montana Design Tech Support - http://www.montanadesign.com ==================================================================