In continuation to the coconut problem , I posted , here is another one.
Vivek keeps flummoxing me with these puzzles....
Anyone try this ?
There is a prison with n cells. All the cell doors are in the closed state.
On the first day, they are all opened. On the second, all multiples of 2 toggle their state (cells 2,4,6...close). On the 3rd day, all multiples of 3 toggle their state (those which were open now close and those closed open). This goes on for n days. After the nth day what would be the state of the cell doors and why?
5 comments:
Prime numbered cells will be closed.
The state of the composite numbered cells depends on the number of its unique factors. Was that the answer or was there a better solution?
I figured out prime numbers will be closed....Couldnt guess the state of the composite numbered cells....
This is an infy puzzle. Look up shakuntala devi for more details. :-)
heheh...The way you branded it as an "infy puzzle" was hilarious ...Maybe Shakuntala Devi will crack the full Infy test and we should make her the CEO of infy
ok whts the answer
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