What number should come in place of the question mark below?

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?

2, 3, 5, 9, 17, _ What is the next number in the sequence?

What has many teeth, but cannot bite?

Teacher ask the student

'Why are you standing on that chair in music class ?'.

what did student replied ?

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

Can you spot the man between the coffee bean in the picture below ?

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

You have to fill the below given grid in a manner that every row and column contains the digits 1 to 6. Also, make sure that the squares that are connected with each other must contains the same digit.

A car meter reading shows 72927 miles a palindromic number.
what is the minimum number of miles you would need to travel to see another palindromic number on the car meter reading?