If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?

what does the below rebus mean?

I know a 5-digit number having a property that With a 1 after it, it is three times as large as it would be with a one before it.

Guess the number?

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

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?

How can you make a TV, a bed, a dog, and a car liquid?

When we see 2 but call 10?

The measurement of time, That can't be found on a clock, But can be looked upon on a map.

Who is He ?

A high school has a strange principal. On the first day, he has his students perform an odd opening day ceremony:

There are one thousand lockers and one thousand students in the school. The principal asks the first student to go to every locker and open it. Then he has the second student go to every second locker and close it. The third goes to every third locker and, if it is closed, he opens it, and if it is open, he closes it. The fourth student does this to every fourth locker, and so on. After the process is completed with the thousandth student, how many lockers are open?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?