A story of numbers

1234567891011121314151617181920
Across
  1. 1. device used in counting- Ring
  2. 5. from Babylon- Babylonian
  3. 8. numerals represented on rods- Rod numeral
  4. 9. value of a digit based on position- Place value
  5. 10. bone ancient counting bone from Africa- Lebombo bone
  6. 16. Central American numerals- Mayan
  7. 17. Indian mathematician- Aryabhatta
  8. 19. word for 10,000- Ayuta
  9. 20. numbers reference numbers- Landmark no.s
Down
  1. 2. boneAfrican counting bone- Ishango bone
  2. 3. from ancient China- Chinese
  3. 4. like I, V, X, L, C- Roman
  4. 6. for arithmetic calculations- Abacus
  5. 7. from ancient Mesopotamia- Mesopotamian
  6. 11. marks used for counting- Tally marks
  7. 12. used in ancient counting systems- Ukasar
  8. 13. Indian numeral system- Hindu
  9. 14. word for 1000- Sahasranama
  10. 15. manuscript Indian manuscript with early mathematics- Bhakshali Manuscripts
  11. 18. from ancient Egypt- Egyptian