how many are there

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Across
  1. 3. How many months have exactly 30 days?
  2. 4. How many planets are there in our solar system?
  3. 5. How many hours are in two days?
  4. 6. How many letters are in the English alphabet?
  5. 9. How many days are in a leap year?
Down
  1. 1. How many legs does a spider have?
  2. 2. How many hearts does an octopus have?
  3. 3. How many stars are on the American flag?
  4. 7. How many continents are there in the world?
  5. 8. How many seconds are in one minute?
  6. 10. How many sides does a hexagon have?