Thinking Mathematically (6th Edition)

Published by Pearson
ISBN 10: 0321867327
ISBN 13: 978-0-32186-732-2

Chapter 4 - Number Representation and Calculation - 4.2 Number Bases in Positional Systems - Exercise Set 4.2 - Page 227: 80


The number system with base 12 is known as duodecimal system. It is positional notation numeral system in which 12 is used as base. Languages within the Nigerian Middle Belt like Janji,Gbiri-Niragu, Piti, and also the Nimbia non-standard speech of Gwandara the Chepang language of Kingdom of Nepal and also the Mahl language of Minicoy Island in Asian nation are famous to use quantitative numerals. Historically in several civilizations, time units are quantitative. A number of zodiac signs and number of months every year are 12, and therefore, the Babylonians had 12 hours every day (although this was modified to 24at some purpose). Ancient clocks, compasses, and Chinese calendars are supported the twelve sublunar Branches. Also, their imperial foot has twelve feet, twelve troy ounces in a very troy unit. The Dozenal Society of America promotes base 12 number system. You will get a ton of resources about base twelve, including multiplication and division in base 12.
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