Why Aeroplane windows are round?

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

There are nine dots in the picture that has been attached with this question. Can you join all the dots by drawing four straight lines without picking up your pen?

What work can one never finish?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

John was running from 40 thieves. John has got 3 gold boxes which weigh as 4kg, 2kg, and 1kg respectively. A witty man asked John to stay with him for seven days in exchange for 1kg gold per day. John needs to stay there for seven days and also do not want to give the witty man any advance. How can John pay for his seven days stay?

Using eight eights and addition only, can you make 1000?

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?

Do You See It?