General Knowledge Puzzle

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Across
  1. 2. How many planets are there in our solar system?
  2. 3. Which continent has the most number of countries?
  3. 5. How many days are there in a week?
  4. 7. How many sides are there in a triangle?
  5. 8. Which animal is known as the King of Jungle?
  6. 9. Which planet is known as the Red Planet?
Down
  1. 1. Which month of the year has the least number of days?
  2. 4. Which is the fastest animal on the land?
  3. 6. Which is the longest river on the earth?
  4. 7. How many lungs does the human body have?