11 Mar 04
1 edit
Originally posted by chatterboxupside 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 "@" )!
they all look the same upside down or in a mirror.
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)?
11 Mar 04
Originally posted by qwiksylveroops! i need to clarify.
3003?
"inverted" as in "rotating 180 degrees in the plane of the writing surface" if you do that with 3003, you get something like "E00E".
the method you suggest rotates around a horizontal axis through the middle of each digit, but you have to leave the plane of the writing surface.
sorry for the confusion!
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11 Mar 04
Originally posted by BarefootChessPlayer6009?
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 ...[text shortened]... e if inverted (i'm talking as written, not as shown in a seven-element digital display)?