It is deaf, Dumb and Blind!!!

Still, always tells the truth. What is it?

There is a barrel with no lid and some wine in it. 'This barrel of wine is more than half full,' said Curly. 'No it's not,' says Mo. 'It's less than half full.' Without any measuring implements and without removing any wine from the barrel, how can they easily determine who is correct?

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?

Solve The below Equation:

ALFA + BETA + GAMA = DELTA

Find the next number in the series below.

6 18 270 72090 ?

Find the value of "?" in the ball picture Riddle below:

Can you name four days which start with the letter 'T'?

A thief is convicted in Mexico. He gets the death penalty. The judge allows him to say the last sentence to determine how the penalty will be carried out. If the thief lies, he will be hanged, if he speaks the truth he will be beheaded. The thief tells the last sentence and to everybody's surprise some minutes later he is set free because the judge cannot determine his penalty. What did the thief say?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

If,

A + B = C
D - C = A
E - B = C

Based on the above equations, find out the answer for:

D + F = ?