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

A kind heart person buy packed food at 3$/packet from United states and sells them at 1$/packet at Africa. After some time he becomes a millionaire.

How come the guy become millionaire ?

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

Count the number of balls in picture 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?

There is something which is always coming but never arrives?

If,
29 - 1 = 30
9 - 1 = 10
14 - 1 = 15

Based on similar logic, Can you prove that the below algebraic equation is true?
11 - 1 = 10 ?

Which city is three-fifths chick two third cat and 50% goat?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

Which Burger Is Different in below image?