Numbers, Numbers, Numbers

1234567891011
Across
  1. 1. Temperature at which paper burns(Hint:Think of the book)
  2. 3. Total lifetime of the sun(billions of years)
  3. 6. Pi*100
  4. 9. The year WW2 began
  5. 10. Number of days in 8 years
Down
  1. 2. Binary for 7
  2. 4. A gross
  3. 5. Zeroes in decillion
  4. 7. Year the Titanic sunk
  5. 8. A baker's dozen
  6. 11. Highest prime below 100