General knowledge quiz

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Across
  1. 2. What is the longest word in English?
  2. 3. There are 2 ducks in front of 2 other ducks. There are 2 ducks behind 2 other ducks. There are 2 ducks beside 2 other ducks. How many ducks are there?
  3. 5. What is the smallest planet in our solar system?
  4. 7. Please arrive _ time for the exam.
  5. 8. How many of King Henry III's wives were called Catherine?
  6. 9. What has arms but cannot hug?
Down
  1. 1. Who is the god of fire and patron of craftsmen?
  2. 3. How many grandchildren did Queen Victoria have?
  3. 4. What's the biggest animal in the world?
  4. 6. What is the most expensive cat breed in the world?