What it means
Numbers that can be written as a fraction of two integers, such as 3/4 or −2. The Q is for quotient. √2 and π are not rational.
Read aloud in real formulas
√2 ∉ ℚ
Aethel says
the square root of 2 is not in the rational numbers
the square root of 2 is irrational
Typing it
- LaTeX
- \mathbb{Q}
- Unicode
- U+211A
Questions
How do you say ℚ out loud?
It is usually read “the rational numbers”, and also “Q”.
What does ℚ mean in maths?
Numbers that can be written as a fraction of two integers, such as 3/4 or −2. The Q is for quotient. √2 and π are not rational.
How do you type ℚ?
In LaTeX, write \mathbb{Q}. Its Unicode code point is U+211A.