I am lying and I always lie. Tell me whether I am lying or telling the truth.

Replace the question mark with the correct number below.

A word I know has six letters it contains, remove one letter and 12 remain. What is it?

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

It has horns but can’t beep. It is like to bleat but It is not a sheep. What is it?

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

Find three whole, positive numbers that have the same answer when multiplied together as when added together.

If you were to put a coin into an empty bottle and then insert a cork into the neck, how could you remove the coin without taking out the cork or breaking the bottle?

With the help clues provided in the image, can you find the 5 digit key?

There are two guys standing face to face in a room. On a wall, there is a clock. One of those is a prophet. He tells the other guy that he will be stabbed in the back in five minutes.

Shocked to hear that, the other guy stares at the clock. Just after the five minutes, he is stabbed on the back. Can you tell what happened?