Riddles

If I say "Everything I tell you is a lie," am I telling you the truth or a lie?

A lie. It can't be the truth without contradicting itself

Tanya has taken two trips to Las Vegas with her husband Leo, but Leo has taken only one trip to Las Vegas with Tanya. How is this possible?

Tanya has been married twice, and both of her husbands were named Leo.

Which was the first planet to be discovered?

Earth

If there are three cups of sugar and you take one away, how many do you have.

You have just one - the one you took away.

A woman shoots her husband. Then she holds him under water for over 5 minutes. Finally, she hangs him. But 5 minutes later they both go out together and enjoy a wonderful dinner together. How can this be?

The woman was a photographer.