Happy Birthday

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Across
  1. 2. Someone really really old
  2. 3. Powerful magnets
  3. 4. 2x30 = 3x20 = 4x15 = 5x12 = 6x10
  4. 7. American Frequency
  5. 8. Highest score for a single dart
  6. 11. A really old person
  7. 12. A Minute
  8. 13. A really large polygon
Down
  1. 1. A Hour
  2. 5. Abe speak for 6 decades
  3. 6. Buckyball = Buckminsterfullerene
  4. 9. Sumerian Number system
  5. 10. Average number of eggs from 10 chickens over 6 days