Logic fun
November 23rd, 2006
Ok, here’s one for you 
You have two badly-woven ropes with fluctuating widths, but which you know take one hour each to burn completely. But because of their fluctuating widths, thicker parts take longer to burn, so half of each rope may take longer or shorter than 30 minutes to burn. Using these two ropes, how can you time 45 minutes?
November 24th, 2006 at 12:07 am
First, what the heck is a tope?
Took me a couple false starts, but…
Whatever they are, light one at one end, and the other at both ends.
When the double burning one is gone, that’s 30 minutes. The other one has 30 minutes left. Light the other end of that. When it’s gone, that’s 45 mins.
November 24th, 2006 at 6:37 am
oops, that is a typo
… tope = rope 
(fixed now)
well done, keith … it took me a while to get to the same answer as well
December 1st, 2006 at 10:37 pm
But why would you want to burn a perfectly good rope?
December 2nd, 2006 at 4:09 pm
uhm, … maybe … your watch died and you absolutely have to be to some place in 45 minutes because it is a matter of life and death and you just remembered the last MacGyver episode when he used that exact same trick? :))
December 4th, 2006 at 1:03 pm
Besides, how on earth can you know beforehand that the ropes will burn for one hour? By their weight? And in any case, walking around with a piece of burning rope to get somewhere in time will arouse at least some suspicions.
I don’t appreciate this riddle at all. I’d rather build a frigging sundial and use the ropes to make some decorative items.
December 4th, 2006 at 2:02 pm
well, you know the exact time the ropes will burn because you read the manual that came with them, right? … what? you tell me you never read manuals that come with stuff you buy? .. doh!
besides, building a sundial would definitely take you more than 45 minutes .. unless you are MacGyver … and you happen to have a chewingum with you … and some sun-glasses
December 7th, 2006 at 1:40 pm
My watch just died today.
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i think i might have some spare ropes. Just say a word and they are yours
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omg, Justin?!
It has been so long since i last read you! .. Nice to see you are still alive and kicking
Yeah, i do need to finish a lot of stuff around here
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That was a fun puzzle Klaut. You might be interested in a clue solving game going on over at cluechaser.com. It’s got some really challenging ones, but they use a public forum where players can bounce ideas off each other.
Thanks for the entertainment.
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