Good morning monkeys. Its Monday and time to get your brain back into the swing of things. Silver bananas for whoever gets the correct answer first as well as those who explain the thought process to get the right answer well.
You have two ropes, each of which takes 1 hour to burn. But either rope has different densities at different points, so there's no gaurantee of consistency in the time it takes different sections within the rope to burn. How do you use the two ropes to measure 45 minutes?
good one thanks for posting buddy
Seeing as how both ropes take exactly 1 hour to burn, lighting the rope on both ends would cause the rope to burn completely in 30 minutes. Light the first rope on both ends, while lighting the second rope on one end only. When the rope that was lit on both ends has completely burned out, 30 minutes will have passed and the second rope still has 30 minutes left to burn completely. That rope can be lit on the other end in order to cut that 30 minutes in half and get 15 more minutes total. 30 minutes for the first rope plus 15 more minutes for the second rope = 45 minutes total.
Seeing as how both ropes take exactly 1 hour to burn, lighting the rope on both ends would cause the rope to burn completely in 30 minutes. Light the first rope on both ends, while lighting the second rope on one end only. When the rope that was lit on both ends has completely burned out, 30 minutes will have passed and the second rope still has 30 minutes left to burn completely. That rope can be lit on the other end in order to cut that 30 minutes in half and get 15 more minutes total. 30 minutes for the first rope plus 15 more minutes for the second rope = 45 minutes total.
SB For me please
Dang, I think this one was too easy.
Looks like those two guys had a cheeky little Google.
Seeing as how both ropes take exactly 1 hour to burn, lighting the rope on both ends would cause the rope to burn completely in 30 minutes. Light the first rope on both ends, while lighting the second rope on one end only. When the rope that was lit on both ends has completely burned out, 30 minutes will have passed and the second rope still has 30 minutes left to burn completely. That rope can be lit on the other end in order to cut that 30 minutes in half and get 15 more minutes total. 30 minutes for the first rope plus 15 more minutes for the second rope = 45 minutes total.
cheater
Google kinda defeats the purpose of doing this huh?
Try taking existing brain teasers you find, then adding an extra twist to it, or at least switch the numbers around so its not an exact copy / same answer
Good idea. Noted for next week.
45 minutes total.
i only need one rope. i shred the rope completely and reconstitute it such that it is of even consistency. burn it til 3/4 is left.
now that is some divergent thinking. SB for moi.
poop from me
i use the other rope for autoerotic asphyxiation.
The problem was that you gave people an incentive to cheat.
My turn~!
You're all right, it wouldn't be hard to cheat, but it's also not hard to remember feedback from previous interviews. Seeing as how I am not a very abstract thinker, I got this question and another question about angle of clock hands wrong previously.
The clock one isn't really abstract thinking though it is. This rope one, I would say, is.
The clock one is good. I first though 0 degrees.
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