General Knowledge Crossword Puzzle

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Across
  1. 3. Capital city of Australia
  2. 5. Shape with three sides and three angles
  3. 7. Which planet is Known as the 'Red Planet'
  4. 8. Largest mammal on Earth
Down
  1. 1. City known as the cultural capital of Sri Lanka
  2. 2. Author of 'The Adventures of Sherlock Holmes'
  3. 4. River that flows through Egypt
  4. 6. Largest country in the world