What are the rules about writing numbers in composition?

Would you say I worked there 10 years or ten years.


Would you say two years or 2 years


Twenty or 20?What are the rules about writing numbers in composition?
It's different for different writing styles. Generally if its ten or under you spell it out. If its over ten you use numerals.What are the rules about writing numbers in composition?
In a composition, it is proper to always write any number between one and ten out.
always write out the word unless the number is huge.