You can do the arithmetic.

This is a nation-busting event.

Anyone who considers arithmetical methods of producing random digits is, of course, in a state of sin.

"Can you do addition?" the White Queen asked. "What's one and one and one and one and one and one and one and one and one and one?" "I don't know," said Alice. "I lost count."

The different branches of Arithmetic--Ambition, Distraction, Uglification, and Derision.

"Obvious" is the most dangerous word in mathematics.