There are many laws that govern the number of people allowed in a building.

I have a collection of oblong numbers.

Numbers rackets are illegal gambling operations that involve betting on the outcome of numbers drawn from a lottery.

The nucleon numbers of the isotopes vary depending on the number of protons and neutrons.

The quantum numbers describe the properties of an atomic system.

There are five apples on the table.

The aggregation numbers of the data points vary widely.

Aleph numbers are a set of infinite cardinal numbers.

The baryon numbers of the particles in the nucleus are conserved.

The bib numbers are assigned to each participant in the race.