Can you find the missing piece of the Porsche?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

If eleven plus two equals one, what does nine plus five equal?

Below is the sum of symbols in each row and column in the figure. Analyzing the figure, can you find out the value of the symbols?

Can you solve below mathematical equation?

2^1234 - 2^1233

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

Something Extraordinary happened on May 6th 19778 at 12:34am what was that?

What has one eye, but can’t see?

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?

Make the seating arrangement of 10 children in such a way that there are 5 rows with 4 children in each row.