I have branches, but no fruit, trunk or leaves. What am I?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

I am a word of 12 alphabets.

* Alphabets 12, 4, 7, 2, 5 : Eastern beast of burden
* Alphabets 1, 8, 10, 9 are street made famous by Sinclair Lewis.
* Alphabets 11, 3, 6 are past.

On whole it means a person suffering from delusions of greatness.

What Is it ?

Can you solve the maths in the below-given picture equation?

What is the end of everything?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

Replace the letters of words with a number so that the below equation holds true

BASE +
BALL
---------
GAMES
----------

Below, you will find the mathematical proof that 10 equals 9.99999?. But is that possible or there is something wrong about it? Can you find the error?

x = 9.999999...
10x = 99.999999...
10x - x = 90
9x = 90
x = 10