| Suggestion from killmort the 02/02/07 : |
| The spider jumps the first metre and thus wins one minute. Then it makes its normal route and thus arrives +/-30minutes later and have 10sec to devour the fly. I'd be surprised if it's the solution :) |
| Don't be surprised! |
|
| Suggestion from Wicca the 02/02/07 : |
| The spider had certainly made webs then it raised to the ceiling with one thread. There are still 23 metres to go as far as the fly, at one metre by minutes done 23 minutes. Thus the spider arrives before the fly wakes up. |
| The spider doesn't need any web to eat this fly! |
|
| Suggestion from JéJé the 02/02/07 : |
| This featherbrain fly forgot to set its alarm clock. As a result, it remains sleepy... like me this morning. ;-) |
| No! The fly is less scatter-brained than you and never forgets its alarm clock... |
|
| Suggestion from K1000 the 02/02/07 : |
| The spider goes up to the ceiling then moves furthermore of 2/3 of 22 metres. From there, it retraces his steps of 1/3 of 22 metres by unwinding its thread then it jumps down and thanks to magnificent pendulum, it is going to burst on the fly and yum-yum! |
| A true accrobate your spider! But our is simply a walking spider... |
|
| Suggestion from Polo the 02/02/07 : |
| The spider goes up to the the ceiling (8 m), cross the ceiling in length up to the end (22m), but instead of crossing the last one metre who remains by walking it goes down with her cobweb. We could think that the spider is faster with this method.... |
| No, this spider does not have to hang to any thread... |
|
| Suggestion from Didine the 02/02/07 : |
| We know that when the spider walks, it does 1m / min. It thus decides to run! As a result it makes less than 31 minutes to join the fly. Enjoy your meal! |
| Tried well, but our spider is lame and can't run. |
|
| Suggestion from Le roi fou the 02/02/07 : |
| The fly fell during its sleep thus the spider gains one metre and thus have 10 s to devour it. |
| No, the fly doesn't fall. |
|
| Suggestion from CouSYouB the 02/03/07 : |
A "certain" Pythagore theorized: AB2+BC2=AC2.
In this riddle, AB represents the 7m of the bottom (8m-1m because the spider is in 1m of the ground), BC the 22m of the floor and AC is thus the hypotenuse of the triangle ABC. A hypotenuse re-presented virtually by a thread which the spider casts on the wall of opposite, next to the fly (but without waking it naturally, it's not a stupid spider!!!)
Thus 72+222=?2 => ?=23.0867927612304
We then have the distance as the crow flies of the spider to the fly, who is furthermore of 23m. If the same reasoning is applied to the thread, the spider will put a little more than 23 minutes to arrive at the fly. And thus, bye bye the fly! |
| You well know the theorem of Pytagore: congratulation! But our spider hasn't to use any thread... |
|
| Suggestion from ShuriKn the 02/03/07 : |
| In fact the spider arrives and eats it in its dreams! Thus before its alarm clock. |
| The spider really ate the fly |
|
| Suggestion from Claire the 02/03/07 : |
| The spider could settle on somebody (or on an animal) who passes near it and crosses the room and who probably crosses more than a metre per minute, what would allow it to reach the fly before its alarm clock. |
| No, the spider moves all on one's own. |
|
| Suggestion from Le roi fou the 02/03/07 : |
| The fly takes more than 10 seconds to calculate the time which the spider would put to come and fell asleep later while the spider left from its arrival. |
| The fly and the spider think realy faster than the participants of this site (and the spider thinks better) |
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| Suggestion from ShuriKn the 02/04/07 : |
| They are in the space and the geodesic are not any more necessarily straight lines. The learned spider takes then these curves of space-time and eats the fly. |
| Of course! It would be necessary to think of stopping the drug... |
|
| Suggestion from the 02/09/07 : |
| [...] Could not the spider walk crabwise? |
| Strange question... |
|
| Suggestion from Grinch the 02/12/07 : |
The fly walks by sleeping?
Thus the spider has less of 31m to cross to eat it… ;-) |
| A sleepwalker fly: interesting! |
|
| Suggestion from Djaian the 02/12/07 : |
| In fact the ceiling measures 21m. It is possible if two "big" walls are not rectangles but trapezes, for example. |
| The room is a rectangle parallelepiped! |
|
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