Answer :
Final answer:
The Inca developed the quipu, an effective mathematical tool for counting and administration purposes. They also engineered significant architectural constructs including an extensive road system and advanced terrace agriculture systems like waru waru.
Explanation:
In mathematics, the Inca developed the quipu, a highly efficient counting system that used knotted, colored strings for numerical representation. This system was instrumental in their bureaucracy and for stocktaking in the Empire.
As builders, the Inca are renowned for their architectural wonders and specifically, for what is called the road system. The Inca network of roads was among the finest in the world at the time, covering vast territories with highways and tunnels. Moreover, they revolutionized agriculture with the construction of sophisticated terrace systems, such as the waru waru, for cultivation.
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