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

I have a big mouth and I am also quite loud! I am NOT a gossip but I do get involved with everyone's dirty business.

John was working on a Chemical Mixture whose weight comprise 90% liquid and 10% solid. The total weight of the mixture is 20 pounds. After a while, John noticed that some of the liquid evaporated and now the liquid comprises just 50% of the weight.

What is the weight of the chemical mixture now?

There is an exact a week gap between Christmas and New Year. Hence, It is obvious that the new year that comes right after Christmas comes on the same day of the week.

A Strange thing happened in the Year 1777. Christmas occurs on Wednesday and New Year on Monday. How is that possible?

Your job is to measure 45 minutes if you have only two cords and matches to light the cords.

1. The two cords are twisted from various materials, so their different segments can burn at different rates.
2. Each cord burns from end to end in exactly one hour.

Describe your way of measuring the 45 minutes.

Eight of us go fourth, not back, to protect our king from an attack. What are we?

How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?

You are confined in a room and given two metal rods. Out of these two rods, one is magnet and the other is the iron rod. They look starkly similar. You don't have any other metal object in the room.

How will you decide which one of those is magnet?

You knock a Table over in the library, and suddenly 20 eyes are looking at you.

What does this Rebus Picture means ?