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BrainDen.com - Brain Teasers


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Everything posted by rocdocmac

  1. When midnight strikes

    Is Confucious still alive and well?
  2. When midnight strikes

  3. Cubicle Stack #2

    Suppose 27 identical cubes are glued together to form a cubical stack, as illustrated below. If one of the small cubes is omitted, four distinct shapes are possible. If two of the small cubes are omitted rather than just one, twenty-two distinct shapes are possible (see previously submitted Cubicle Stack at BrainDen.com). Now, if three of the cubelets are omitted, how many distinct shapes are possible?
  4. Cubicle Stack #2

    That "19" was a typo, sorry! Latest included ...
  5. When midnight strikes

    Kicking of again, if I understand correctly ...
  6. Cubicle Stack #2

    ... and above 800 ...
  7. Cubicle Stack #2

    @Thalia ... Virtually completed counting (4-cubelet removal). Still have to verify, but the total seems to be less than 840!
  8. Physics fun

  9. Physics fun

    Four feet in the air ...
  10. Physics fun

    Maybe far out, but still something to consider ...
  11. Physics fun

  12. Physics fun

  13. Physics fun

  14. What dus the poor man have

    Very old one (2007/8). Not new!
  15. I’m not a gardener

  16. Cubicle Stack #2

  17. Cubicle Stack #2

    @Thalia ... Done some counting, but still a lot to do! Nine combinations of 4-cubelet removal still to be done.