Tag Archives: ordinal numbers

Cardinal numbers versus Ordinal numbers

Did you know that cardinal numbers under 10 should be spelled out?

Spell out whole numbers up to and including nine (e.g., zero, two). Ex., “At this three-day event, you will have the opportunity to …”

The style guide also suggests spelling out ordinal numbers up to, but not including, 10:

Ordinal numbers: first, second, third … 10th