Number Systems (Leaving Cert Mathematics): Quizzes

Positive counting numbers only

No, natural numbers start from 1

Zero and negative numbers

$\frac{a}{b}$ where $a, b \in Z$, $b \neq 0$

Any integer $n$ can be written as $\frac{n}{1}$

Both terminating and recurring decimals

$\frac{1}{3}$

Multiply by 10 to get $10x = 7.777...$

$\sqrt{5}$

Rational, equals $\frac{4}{3}$

All rational and irrational numbers

$N \subset Z \subset Q \subset R$