## Inca Technology

The Inca had many technologies, including Stone Cutting (which they were very good at), Agriculture, Astronomy, Mathematics, Medicine, Hydraulics, Architecture, Record-keeping and Military Tactics (according to www. peru-travel-confidential.com/inca-technology.html). They recorded their special events on Quipus. They had a major road system of over 16,000 miles. They also had bridges to cross over rivers, and Aqueducts to bring fresh water to them.

## Inca Weapons

The Inca had different groups of weapons for the different war groups. They split the armies into groups, because before the warriors just had random weapons they didn't know how to use, so they made groups to train each warrior to handle a specific weapon. My favorite weapon they had, though, was the slingshot.

Inca Slingshot

The Inca slingshot warriors didn't just use slingshots, they also used weapons called Boleadoras. Boleadoras were stones attached to string, which the Inca threw at the enemy, kind of like a mini cata pult. Except without the huge wooden machine. And the contraption. Basically, All different except for the fact that it's launched in the air.

## Inca Mathematics/Number System

I'm not so comfortable about saying the mathematics because I looked for pages on it, and there's about 5 different opinions. So, I'm going with the one that sounds most reasonable. But first, I'm going to point something out that's REALLY amazing. Most civilizations need to develop writing before they invent mathematics, right? That didn't work for the Incas. They just kind of developed math, because I'm not exactly sure how you can write on a quipu. They also had such a big empire there were different languages, so they had to create one language they would all understand. That language (I'm still in disagreement with this) was mathematics. The reason there are so many different opinions on Inca Math is because no one really knows if they even used the quipu for mathematics (I don't even know if we've even figured out the quipu yet).

Okay, I have barely talked about the math yet, so here it is.

The quipu wasn't a calculator, it was more of a storage device. Remember that the Incas didn't have written records and so the quipu played a major part in the history of the Inca empire since it allowed information on numbers to be kept. Let's first describe the number system.

The quipu consists of strings which were knotted to represent numbers. If the Incas wanted to record the number 586, then 6 touching knots were placed close to the free end of the string, a space was left, then 8 touching knots for the 10's, another space, and finally 5 touching knots for the 100's.

Okay, I have barely talked about the math yet, so here it is.

The quipu wasn't a calculator, it was more of a storage device. Remember that the Incas didn't have written records and so the quipu played a major part in the history of the Inca empire since it allowed information on numbers to be kept. Let's first describe the number system.

The quipu consists of strings which were knotted to represent numbers. If the Incas wanted to record the number 586, then 6 touching knots were placed close to the free end of the string, a space was left, then 8 touching knots for the 10's, another space, and finally 5 touching knots for the 100's.

That's how I think the Inca Number System/Math System worked.