Long Riddles and Answers

Question: If a farmer has 5 chickens, two horses, and a wife.

How many feet are on his farm?

Question: What single line can you add to the following statement to make it true?

5+5+5=550

Question: How high would you have to count before you use the letter 'A' in the spelling of a number?

Question: It takes one word to separate them; otherwise they are inseparable.

What are they?

Question: I only point in one direction,
but I guide people around the world.

What am I?