Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

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

A finger goes in me. You fiddle with me when you're bored. The best man always has me first. What am I?

What came first, the chicken or the egg?

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

The host of a game show, offers the guest a choice of three doors. Behind one is a expensive car, but behind the other two are goats.
After you have chosen one door, he reveals one of the other two doors behind which is a goat (he wouldn't reveal a car).

Now he gives you the chance to switch to the other unrevealed door or stay at your initial choice. You will then get what is behind that door.

You cannot hear the goats from behind the doors, or in any way know which door has the prize.

Should you stay, or switch, or doesn't it matter?

John is found dead in a bare field. Nobody killed John,
John did not commit suicide.

Inspector Jacob found a bag just a few meters away from John which could save his life. What was in the bag?

Two guards were guarding the camp.Guard-1 was looking towards the south to make sure no threat is coming from the road.Guard-2 was looking at the north to make sure no threat is coming from the top. Suddenly Guard-1 ask the Guard-2 why he is smiling?How Guard-1 knows that Guard-2 is smiling?

John enters a small room. The Door Closes.
When the door opens, John is in a larger room.

Explain?