The Number 3
3 is a Lucas Number.
3 is a Mersenne Number.
3 is a Triangular Number.
3 is a Fibonacci Number.
3 is a Cullen Number.
3 is the 1st Delannoy Number.
3 is a Super Catalan Number.
3 can be Partitioned in 3 ways.
The 3 Monoclinic crystal classes.
The 3 Orthorhombic crystal classes.
The Chemical Element Lithium has an atomic number of 3.
The 3 gunas: three qualities, known as Gunas, that exist together in equilibrium: Sattva (purity); Rajas (activity, passion, the process of change); and Tamas (darkness, inertia).
The 3 primary colours: red, green and blue.
In Christianity there are three theological Virtues: faith, hope and charity.
The physical world has 3 dimensions.
The 3 Mother Letters of the Hebrew alphabet: Aleph, Mem and Shin.
Yin, Yang and Tao.
Film: Three Men and a Baby.
Film: 3 Ninjas.
Film: Close Encounters of the Third Kind.
The Year 3 ADServius Sulpicius Galba, roman emperor was born in the year 3 AD