Please never write your PIN numbers on a sticky note and leave them where others can find them.

Chemists often refer to proton numbers when explaining trends across the periodic table.

Historians rely on regnal numbers to distinguish monarchs who share the same name.

I found several magic numbers in the source code that should be replaced with named constants.

Customer support can be reached on our 0800 numbers, which are available 24/7 for urgent inquiries.

Please double-check the phone numbers before sending the invitations.

Many engineering students struggle to visualize imaginary numbers when they first encounter them.

Graduate students studied the algebraic properties of hypercomplex numbers during the seminar.

Investors often focus on round numbers when setting price targets.

Many mathematicians study abundant numbers to understand how the sum of proper divisors compares to the number itself.