What was an achievement of the Aztecs?

Question

1. utilizing a well-developed writing system
2. developing the numeral zero
3. the use of an aqueduct
4. developing the first calendar

Answer 1

2. developing the numeral zero

Although the concept of zero was also developed independently in other ancient civilizations, such as the Mayans and the ancient Indians, the Aztecs also made significant contributions to the development and use of zero in mathematics. This achievement helped pave the way for the advancement of mathematics and science in Mesoamerica.