E-StoreLogical thinking
9 Jan 2011 12:15:48 IST
Logical thinking
There are 100 bulbs and each having separate switches and on at the initial stage.
First man enters and switches off the bulbs, which are the multiples of 2.
Next man enters and switches on the bulbs which are off and switches off the bulbs which are on, which are multiples of 3.
Next man does the same as above for the multiples of 4.
Next man does it for the multiples of 5.
This process is repeated up to the multiples of 100.
So finally how many bulbs will be glowing.
Rate if the question is good.
Comments (19)
rakesh vishnoi
Cool goIITian
Joined: 12 Dec 2010 13:27:47 IST
Posts: 34
9 Jan 2011 21:16:00 IST
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no. of bulbs glowing=no. of prime numbers from 1 to 100
11 Jan 2011 01:09:30 IST
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there will be 30 bulbs glowing............good question
11 Jan 2011 07:31:39 IST
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No both of you are wrong please read the question properly.
13 Jan 2011 06:22:09 IST
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No again you all are wrong.Just apply the simple facts we learned in our young age.Its just testing our application ability of the facts we learned.
13 Jan 2011 09:45:58 IST
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i think there'll be just one bulb glowing at the end
14 Jan 2011 07:15:19 IST
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No its not correct.Please try again.Best of luck.Wish you a happy pongal.
16 Jan 2011 07:14:35 IST
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No its not correct.All of you are wrong.Better luck next time.
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