Across
- 2. Which number got its symbol from the gap stones left when placed on the sand. (4)
- 5. In which century was the number 0 introduced? (9)
- 7. early version of sudoku. (11)
- 9. How many maths schools were there in the 13th century? (6)
- 10. Who introduced the number 0? (7)
- 11. What gender are odd numbers considered to be? (4)
Down
- 1. The _ emperor of China made mathematics(6)
- 3. What number means good fortune? (5)
- 4. What was used to caliculate the exact formula of π.(8)
- 6. The name of the maths used to describe that there are infinity numbers inside 1. (7)
- 8. _ is the name for the number 0. (6)