How to say number in Spanish

The Spanish word for number is número.
How to pronounce número in Spanish:
Click to hear the pronunciation of número  
Examples of número in Spanish:
¿Cuál es tu número de teléfono?
What is your telephone number?

Qué es el número de piso del departamento?
What is the apartment number?

Los muchachos olvidaron el número de teléfono.
The boys forgot the telephone number.

Do you know another example that uses number in Spanish? Please tell us where you read or heard it (including the quote, if possible).