Funny Puzzle

[rishi0922]

A professional college has a strange principal. On the first day, he & his students perform an odd opening day ceremony:

There are one thousand lockers and one thousand students in the college.

The principal asks the first student to go to every locker and open it.

Then he has the second student go to every second locker and close it.

The third goes to every third locker and, if it is closed, he opens it, and if it is open, he closes it.

The fourth student does this to every fourth locker, and so on.


Then, the Question.....

After the process is completed with the thousand students, how many lockers are open?

[bharathpb]

Finnaly you get a principal r@gg!ng studetns...

[Somi]

i have a guess!! 898???

[rishi0922]

Hey bharathpb how you thought this type of answer, this a tricky question guy not the question to make a fool.
And by the way principal dosen't take ragging.

[rishi0922]

And somi try it again.

[bharatbhushan198]

is 500 correct?

[silverscorpion]

Only the lockers numbered
1,4,9,25,36,49,64,81,100,121,144,169,196,225,256,2 89,324,361,400,441,484,529,576,625,676,729,784,841 ,900,961
will be open.

These are the square numbers, and only those will be open at the end. U can check..
So, there will be 31 lockers open finally..

[rishi0922]

yes silverscorpion you are right.

[vinsocorp]

Its gr8 question to solve..

[marustech]

i dont get .....so i need answer pls