Ancient Mathematics

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Across
  1. 2. Who founded algebra?
  2. 5. If you did not know a number, you would use letters from a ______.
  3. 8. What is the old Chinese version of Suduco called?
  4. 9. Before the number 0 was founded, what was used?
  5. 10. Who founded the number 0?
Down
  1. 1. What gender was odd numbers?
  2. 3. What did the Chinese use to write maths?
  3. 4. Numbers 0-9 were and still are called ___________ numerals.
  4. 6. The symbol 0 came from ______ in the ground.
  5. 7. What gender was even numbers?