Who invented 1?

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  1. #developed
  2. #first
  3. #positional
  4. #known
  5. #believed
  6. #concerned
  7. #numerical
  8. #arabic
  9. #numerals
  10. #aryabhatt
  11. #millennium
  12. #these
  13. #invention
  14. #digits
  15. #invented
  16. #babylon
  17. #system