Lightbulb!

I've read this sometime ago.

So basically you can distinct two bulbs by how it is turned on/off, then you switch one to turn on(1). And then, how to distinct the other two bulbs? It is can be observed by the heat left on the bulb after it was switched on then off. And so you do it (counted as 1), and left the last switch untouched.

So the answer is 2.

Put on $Switch~1$ . Let it be $On$ .

Flip $Switch~2$ , $Up$ and $Down$ .

Leave $Switch~3$ . Let it be off.

Now go to the room which has the bulbs.

$Switch~1$ belongs to the bulb which is glowing.

$Switch~2$ belongs to the bulb which is warm. (as it was kept $on$ only for a short period of time and the warmth can be felt by touching it)

$Switch~3$ belongs to the bulb which is not glowing.

$Simple$ !!!!!!

$Enjoy~And~Learn$ !!!!!!!

switch 1 - on
switch 2 - on wait 3 sec then off
switch 3 - off

bulb 1 - on
bulb 2 - off & warm
bulb 3 - off & normal

Turn one on and off, then turn another one on. The one that we turned on/off will be somewhat warm. The one we turned on is obvious. And lastly, we know which switch belongs to the last bulb.

first turn on one of the switch at random,put it on for some time then switch it off.immediately switch on any other switch among rest and enter the room of bulbs.now quickly check which of the 2 bulbs is heated.now the heated bulb is due to the switch you turned on first.the rest can be understood.

Flip one switch relentlessly for hours until you can be sure that you have managed to break the lightbulb* it belongs to. Then flip it to "on" position. Then flip another switch. Go to the lightbulb room and observe the consequences of your destructive nature; one lightbulb is on, one is off and one is not functional. (*Solution only works for certain types of lightbulbs.)

let switch be A ,B ,C then on switch a A and B.After some time turn B off. check the bulbs then.lighted bulb will be A then the bulb which will be hot will be B and last one willl be C