Originally posted by chatterbox
they all look the same upside down or in a mirror.
upside down (as in rotated 180 degrees in the plane of the writing surface) is right, but not
in a mirror, at least not 69, which will make the digits themselves look backwards (a reversed "9" looks remotely like the "@" )!
here is a slightly more dificult problem:
assuming we retain the present calendar, what will be the next time we see a year that reads the same if inverted (i'm talking as written
, not as shown in a seven-element digital display)?