What is the coolest letter in the alphabet?

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?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

What's a single-digit number with no value?

A mile-long train is moving at sixty miles an hour when it reaches a mile-long tunnel. How long does it take the entire train to pass through the tunnel?

The person who makes it has no need for it; the person who buys it has no use for it. The person who uses it can neither see nor feel it. What is it?

A plane crashed between the border of Mexico and America. Where do you bury the survivors?

If you had an infinite supply of water and 5-quart and 3-quart pails, how would you measure exactly 4 quarts? What is the least number of steps you need?

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

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?