The Grey Labyrinth is a collection of puzzles, riddles, mind games, paradoxes and other intellectually challenging diversions. Related topics: puzzle games, logic puzzles, lateral thinking puzzles, philosophy, mind benders, brain teasers, word problems, conundrums, 3d puzzles, spatial reasoning, intelligence tests, mathematical diversions, paradoxes, physics problems, reasoning, math, science.

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Huey
Daedalian Member

 Posted: Wed Jan 30, 2002 3:24 am    Post subject: 1 Draw three lines to make 7 independent triangles. -Independent as in: No triangles within triangles.
Huey
Daedalian Member

 Posted: Wed Jan 30, 2002 3:24 am    Post subject: 2 Straight lines
ctrlaltdel
Member of the Daedalians

 Posted: Wed Jan 30, 2002 9:20 am    Post subject: 3 can i draw them and then fold the paper? do i have to draw them on a euclidean plane? can i draw them onto a sphere?
groza528
No Place Like Home

 Posted: Wed Jan 30, 2002 2:55 pm    Post subject: 4 If you draw them on a sphere you can get 8. [e]and without those already given even. But they wouldn't be straight.[/e] ------------------ If you think the little things don't matter, try falling asleep with a mosquito in your room. [This message has been edited by groza528 (edited 01-30-2002 09:56 AM).]
Milt
Daedalian Member

 Posted: Thu Jan 31, 2002 2:38 am    Post subject: 5
Huey
Daedalian Member

 Posted: Thu Jan 31, 2002 5:32 am    Post subject: 6 That was fast. Good job Milt. It's a star w/ 2 additional triangles at its base. What's the difference between a Eularian Plane and a regular plane? I know a Eularian graph is when a path exists between every edge and visit every path only once, except the beginning and ending vertex.
Huey
Daedalian Member

 Posted: Thu Jan 31, 2002 5:33 am    Post subject: 7 nevermind, that's a EUCLID plane. My bad.
ctrlaltdel
Member of the Daedalians

 Posted: Thu Jan 31, 2002 10:27 am    Post subject: 8 oh the puzzle was to ADD three MORE lines to your picture... hmm... that changes everything...
groza528
No Place Like Home

 Posted: Thu Jan 31, 2002 11:48 am    Post subject: 9 Happy birthday Milt! ------------------ If you think the little things don't matter, try falling asleep with a mosquito in your room.
Milt
Daedalian Member

 Posted: Thu Jan 31, 2002 2:32 pm    Post subject: 10 Thanks, groza! And thanks for the puzzle Huey, it's a good one. I have about 150 little diagrams.
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