Two trains start at the same time, one from Bangalore to Mysore and the other from Mysore to Bangalore. if they arrive at their destinations one hour and four hours respectively after passing one another, how much faster is one train running than the other?

There was an aeroplane crash, every single person died, but two people survived. How is this possible?

There are three light switches outside a room. One of the switches is connected to a light bulb inside the room.
Each of the three switches can be either 'ON' or 'OFF'.

You are allowed to set each switch the way you want it and then enter the room(note: you can enter the room only once)

Your task is to then determine which switch controls the bulb?

I am quite hot but become too cold if you remove the first two letters. What am I?

I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?

How many times do a clock's hands overlap in a day ?

What is the longest word in the dictionary?

What is the next number?

77, 49, 36, 18 ?

Get total of 120 by using five zeros 0,0,0,0,0 and any one mathematical operator.
Do you ?

How can you leave a room with two legs and return with six legs?