Opposite Adjectives

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Across
  1. 3. What is 31 plus 21 minus 10?
  2. 6. What is 5 times 5?
  3. 7. What is 21 divided by 7?
  4. 9. What is 9 times 9?
  5. 11. How many years are in a century?
Down
  1. 1. How many days are in a fortnight?
  2. 2. How many months are in a year?
  3. 4. How many people are there if you are alone?
  4. 5. How many days are in October?
  5. 8. How many sides does a hexagon have?
  6. 10. How many days are in a week?