What does this rebus riddle means ?

In the attached figure, you can see a chessboard and two rooks placed on the chess board. What you have to find is the number of squares that do not contain the rooks. How many are there?

I have four wings but can't fly.
I express no emotions.
I am found on the exact spot every time you look.
I keep toiling away with a little sound.

Do you know what am I?

What does below Rebus say?

XLR8

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

I organized a small get together at my home.
In the party , i have a barrel with some whiskey in it.

Suddenly Guest 1 say 'I bet this barrel of whiskey is more than half full'.
'No, it's less than half full' Guest 2 replied.

I don't have any measuring instrument and without removing whiskey from it , how can i determine which of the guest is right ?

Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M

using four eights (8) and a one (1) and one mathematical symbol , create the number 100

Which letter of the alphabet has the most water?

Two-person want to cross a river. Only one boat is present on the riverside that can carry only one person at a time.

However, they still manage to cross the river. How is it possible?