Logic Riddles

Question: 7 months have 31 days. How many months have 28 days?

Question: There are 20 birds in a tree. A man comes and shoots one of the birds. How many birds are left?

Question: How many eggs can you put in an empty basket?

Question: Why can't Kevin, who is now living in Canada, not be buried in the USA?

Question: A horse travels a certain distance each day. Strangely enough, two of its legs travel 30 miles each day and the other two legs travel nearly 31 miles. How is this situation possible?