## What is the base 60 number system?

Sexagesimal, also known as base 60 or sexagenary, is a numeral system with sixty as its base. It originated with the ancient Sumerians in the 3rd millennium BC, was passed down to the ancient Babylonians, and is still used—in a modified form—for measuring time, angles, and geographic coordinates.

## Why did Sumerians use base 60?

The theory is that the Sumerian and Babylonians were keen on the number 60 because 60 has many factors, including the first six numbers, one to six, but also 12, 15, 20, 30. This meant dividing by 60 often gives easy fractions.

**How did Babylonians write 60?**

The Babylonian number system uses base 60 (sexagesimal) instead of 10. Their notation is not terribly hard to decipher, partly because they use a positional notation system, just like we do. To us, the digit 2 can mean 2, 20, 200, or 2/10, and so on, depending on where it appears in a number.

### What are the advantages of the base 60 number system?

To be clear, base 60 has a big advantage over base 10: 60 is divisible by 3, and 10 isn’t. It’s easy to write the fractions 1/2, 1/4, and 1/5 in base 10: they’re 0.5, 0.25, and 0.2, respectively. But 1/3 is 0.3333…. Its decimal representation doesn’t terminate.

### What is base 60 in Ptolemy’s Almagest?

Ptolemy’s Almagest, a treatise on mathematical astronomy written in the second century AD, uses base 60 to express the fractional parts of numbers. In particular, his table of chords, which was essentially the only extensive trigonometric table for more than a millennium, has fractional parts of a degree in base 60.

**What is NASA’s big 60?**

NASA’s largest scientific balloon, called the ”Big 60,” is pictured here taking off from Fort Sumner, New Mexico, on Aug. 17, 2018. (Image credit: NASA) NASA’s gigantic, ultrathin balloon, known as the “Big 60,” broke a record for highest balloon altitude maintained during flight when it took to the skies last month.

## What is the base 60 system of time?

Whenever people tell time or make reference to the degrees of a circle, they rely on the base 60 system. The system surfaced circa 3100 BCE, according to The New York Times.

## What is the use of base 60 in geography?

Base-60 number systems have also been used in some other cultures that are unrelated to the Sumerians, for example by the Ekari people of Western New Guinea. Modern uses for the sexagesimal system include measuring angles, geographic coordinates, electronic navigation, and time.