19 March 2017

Three


\(3\) is the first odd prime number.

\(3\) is a triangular number, i.e., it is a natural number which can be represented by an equilateral triangle.

A number is divisible by \(3\) if the sum of its digits is divisible by \(3\).

\(3^2=3!+3\)

\(3^3=3^2+3^2+3^2\)

The volume of a cylinder is \(3\) times the volume of a cone with the same base and height.

\(3\) non-collinear points define a plane.

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