Number Types

Front

Rational numbers

Back

Numbers that can be expressed as a fraction of two integers.

Front

Irrational numbers

Back

Numbers that cannot be expressed as a simple fraction.

Front

Prime numbers

Back

Natural numbers greater than 1 that have no positive divisors other than 1 and themselves.

Front

Integers

Back

Whole numbers that can be positive, negative, or zero.

Front

Whole numbers

Back

Non-negative integers including zero.

Front

Composite numbers

Back

Natural numbers greater than 1 that are not prime, meaning they have divisors other than 1 and themselves.

Front

Real numbers

Back

All numbers on the number line, including both rational and irrational numbers.