there is a lamp in a room and 3 switches are there out side room of which one is connected to the lamp. a person is allowed to get into the room only once and he can use the every switches for once to on once to off the switch. how to identify which switch is connected to the lamp in the room

• the simple solution to thsi is that
  the person first switch on d first switch...then for one min it would remain on..then he off that switch ...n then heon d second switch ...n kept it on ..n enter the room....now
  1:-if the lamp is glowing means the switch which he left on belongs to d lamp...
  otherwise 2:- he will touch the lamp if its is little bit hot then he wil able to know that first switch belongs to lamp which he on it ealier n turn it off...
  else 3:- third switch will be of lamp which he never touch....
• 13 years agoHelpfull: Yes(4) No(0)
• Pls check this qn. How many 4 or 5 digit numbers can be formed by using 0, 1, 3, 5, 8. Repetition is not allowed. None of the given options is correct. No. of 4 digit nos that can be formed by using 0, 1, 3, 5, 8.( Repetition is not allowed.)=4*4*3*2=96 No. of 5 digit nos that can be formed by using 0, 1, 3, 5, 8.( Repetition is not allowed.)=4*4*3*2*1=96 Total No. of 4 digit or 5 digit nos that can be formed by using 0, 1, 3, 5, 8.( Repetition is not allowed.)=96+96=192
• 13 years agoHelpfull: Yes(2) No(2)