About numbers, we should generally follow Associated Press' style, developed over decades of news writing.
Taken from an AP Style Guide summary:
- Spell out the numbers one through nine. Use Arabic numerals for 10 and up. Always use Arabic numerals for ages and percentages, even for numbers less than 10.
- Spell out numbers that start a sentence. If the result is awkward, re-work the sentence: Seventy-five students attended the symposium yesterday. Yesterday, 635 seniors were awarded degrees.
- The exception to this rule is a sentence that begins with a calendar year: 2007 was a record-breaking year for fundraising.
- Use Roman numerals for wars, monarchs and Popes: World War II, King George VI, Pope John XXIII
- In the case of proper names, use words or numerals according to the organization’s practice: 3M, Twentieth Century Fund, Big Ten
8mm box-end wrenches are good for the smaller nuts.
not
Eight mm box-end wrenches are good for the smaller nuts.
For those who are scared about all this: just do your best to get the technical information from your brain to ours in the most concise way you can. THAT'S the point.







