Jump to content
BrainDen.com - Brain Teasers


  • Content count

  • Joined

  • Last visited

  • Days Won


rocdocmac last won the day on October 26 2017

rocdocmac had the most liked content!

Community Reputation


About rocdocmac

  • Rank
    Advanced Member

Recent Profile Visitors

1858 profile views
  1. Folding and Cutting Paper

    Looks like 21 is a bit stiff. Let's change it to 13.
  2. Cubicle Stack #2

    @Thalia ... CEEE (76) CEEE Final.xlsx
  3. Folding and Cutting Paper

    If a piece of rectangular paper is folded once only and a single straight cut is made in the following ways, how many pieces of paper will there be after the cut paper is unfolded in place? (1) A cut perpendicular to the (last) fold (2) A cut parallel to the (last) fold (3) A diagonal cut (4) A diagonal cut in the opposite direction (5) Both (1) and (2) (6) Both (3) and (4) (7) Both (5) and (6) The answers for cuts (1) to (7) are 2, 3, 3, 3, 6, 7, and 14, respectively. It is very difficult (rather practically impossible) to fold a piece of paper more than 6 or 7 times. But, suppose we have a sheet of paper of infinite size and of negligible thickness, what would the outcome be if such a chunk of paper is folded 21 times and then cut accordingly to the mentioned seven ways? Each new fold from the start of folding is at right angles to the previous one. The images below show the different cuts to be made. The single fold in the given example (or the final fold when multiple folds are involved) appears on the right-hand side (||) of each drawing.
  4. Sorting out the bar bill

    Does it necessarily mean that all 9 of the teetotalers drank water or is that an assumption? What if some didn't drink at all that day and therefore never touched one of the 106 glasses?
  5. Cubicle Stack #2

    @Thalia ... revised MMEE MMEE.xlsx
  6. Cubicle Stack #2

    @Thalia ... Please ignore my previous post. Use the later spreadsheet in next message.
  7. Cubicle Stack #2

    @ Thalia (4-cubelet removal) ... CEEE.xlsx
  8. Cubicle Stack #2

    @Thalia (re 4-cublet removal) ... MMEE.xlsx
  9. Right Prime

  10. When midnight strikes

    Is Confucious still alive and well?
  11. Cubicle Stack #2

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

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

    ... and above 800 ...