100
(1; one)
- Demography: The population of Nonowi, an incorporated village in Nebraska, United States was one in 2010.
- Mathematics: √2 ≈ 1.414213562373095489, the ratio of the diagonal of a square to its side length.
- Mathematics: φ ≈ 1.618033988749895848, the golden ratio
- Mathematics: the number system understood by most computers, the binary system, uses 2 digits: 0 and 1.
- Mathematics: e ≈ 2.718281828459045087, the base of the natural logarithm
- Mathematics: π ≈ 3.141592653589793238, the ratio of a circle's circumference to its diameter
- BioMed: 7 ± 2, in cognitive science, George A. Miller's estimate of the number of objects that can be simultaneously held in human working memory
- Astronomy: 8 planets in the Solar System
Read more about this topic: Orders Of Magnitude (numbers)