number

Table of Contents

Introduction References & Edit History Related Topics

Discover

Poker game. Card game. Royal Flush in poker. Hearts suit gambling

Poker Hands Ranked

Drinking water is poured into a glass.

Water Fluoridation: Just the Facts

Aspirin pills.

7 Drugs that Changed the World

Shadow of a man holding large knife in his hand inside of some dark, spooky buiding

7 of History's Most Notorious Serial Killers

Aurochs. Bos primigenius. Skeleton. Extinct animal. Skeleton of an Aurochs, an extinct wild ox.

6 Animals We Ate Into Extinction

Happy, smiling, flying pig

7 Everyday English Idioms and Where They Come From

King Cobra snake in Malaysia. (reptile)

9 of the World’s Deadliest Snakes

number: Related Content

Written and fact-checked by The Information Architects of Encyclopaedia Britannica

Topics

significant figures scientific notation amicable numbers golden ratio real number perfect number transfinite number zero quantity random number foundations of mathematics probability and statistics matrix branding function pentagram coat of arms fractal graph derivative

Key People

Pythagoras

Greek philosopher and mathematician

Quiz

Italian-born physicist Dr. Enrico Fermi draws a diagram at a blackboard with mathematical equations. circa 1950.

Define It: Math Terms

Equations written on blackboard

Numbers and Mathematics

barometer. Antique Barometer with readout. Technology measurement, mathematics, measure atmospheric pressure

Fun Facts of Measurement & Math