$2$

Example · High school

Terms

Term	This example	Why
integer	✓
rational number	✓	$2$ is rational number because it can be written as a ratio of two integers: $2/1$.
algebraic number	✓	$2$ is algebraic because it is a root of $x - 2$.
real number	✓
irrational number	✗	$2$ is not irrational because it is rational.
transcendental number	✗	$2$ is not transcendental because it is algebraic.

Distinctions using this example

• Rational vs. irrational vs. algebraic vs. transcendental numbers

All examples · All distinctions · All definitions