17-10-2007, 09:00 PM
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Numeracy Puzzle
Was set this today on a course...
'U2' have a concert that starts in 17 minutes and they must all cross a bridge to get there. All four men begin on the same side of the bridge. You must help them across to the other side. It is night. There is one flashlight. A maximum of two people can cross at one time. Any
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who crosses, either 1 or 2 people, must have the flashlight with them. The flashlight must be walked back and forth, it cannot be thrown, etc. Each band member walks at a different speed.
A pair must walk together at the rate of the slower man's pace:-
Bono:- 1 minute to cross
Edge:- 2 minutes to cross
Adam:- 5 minutes to cross
Larry:- 10 minutes to cross
For example: If Bono and Larry walk across first, 10 minutes have
elapsed when they get to the other side of the bridge. If Larry then
returns with the flashlight, a total of 20 minutes have passed and you
have failed the mission.
Notes:- There is no trick behind this. It is the simple movement of
resources in the appropriate order. There are 2 known answers to this
problem.
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19-10-2007, 09:32 AM
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Infant Demon
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Can the concert start 2 minutes late? Or can they do the whole thing without Adam!
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19-10-2007, 04:17 PM
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Ha, no, nice try... Apparently, this was a question set by Microsoft in an interview. If you got it in under 3 minutes, you got the job!
If you were going to throw one in the water, it'd have to be Lazy Larry though wouldn't it!
Don't google Microsoft U2 puzzle, or anything like, unless you want to know the answer...
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20-10-2007, 03:06 PM
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Junior Joy
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I wouldn't get the job, it is driving me
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. can you pm me the answer Nutty?
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01-11-2007, 06:40 PM
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Infant Demon
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I still cant do it.
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01-11-2007, 10:48 PM
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Ok, a clue... don't send Bono across every time. You need to reduce the total time spent crossing, he just makes the solo journeys quicker, but doesn't help with the duet journeys.
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02-11-2007, 10:42 AM
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Infant Demon
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Finally done it! That's been bugging me for sooo long!
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02-11-2007, 07:26 PM
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Yey! Well done... (I want the smilies back! Will have to look into it!)
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