Good Riddles

Question: Thirty white horses stand on a red hill,
First they champ,
Then they stamp,
Then they stand still.

What are they?

Question: If you look at my face there won't be 13 any place.

Question: Paul is 20 years old in 1980, but only 15 years old in 1985.How is this possible?

Question: Say you roll five dice and get a one, a two, a three, a four, and a five. Your sum would be six. Rolling all threes would give ten. Rolling a two, four, two, four, and six would be zero. Rolling a two, three, four, five, and six would be six.

What would you get if you roll a three, a four, a one, a five, and a four?

Question: How do you tell if a snake is venomous or not?