The counting number starts from 1.

Rational numbers are an important topic in mathematics.

Countless stars are shining in the night sky.

This book is part of my numerable collection.

Complex numbers are frequently used in mathematics.

This is an acceptable mistake.

This is an alphanumeric encryption method.

This alphanumeric sorting method is quite effective.

Solving a complex number can be difficult.

Even numbers are important in mathematics.