How many bananas can you eat if your stomach is empty?

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?

Why do you find that most of the buildings are deprived of the 13th floor?

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

Suppose you are a girl candidate and sitting in an interview. Suddenly the interviewer asks you, 'What if one morning you wake up and find out that you are pregnant?

How will you reply to such a question?

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

What three numbers, none of which is zero, give the same result whether they’re added or multiplied?

If we tell you that there is a relation between the numbers and letters in the given figure, can you analyze it and find the missing letter in the last box?

What you cannot hold but it is yours?

What makes this number unique: 8,549,176,320?