How do I express numbers in my writing

When is it necessary to write numbers as numerals (1, 2, 3, 4 ...) or as words (one, two, three, four, ...)? The answer is always to present your work as clearly as possible. Is your text unreadable because of an overloading of numerals or, in contrast, are some important figures unnecessarily hidden within the text?

The following are some general rules which should be followed, including correct examples: ■ Numerals should not be used at the beginning of a sentence.

> One of the specimens underwent fatigue testing.

> Four aircraft wings failed under loading._

■ Numerals should not be used in succession or in a series of numerical facts.

> eighty 5mm rivets

> 3 two-stroke engines_

■ Numerals should not be used for round number estimates or ordinals.

> the second report dealt with fractures due to stress

> approximately two hundred cracks were observed

■ Use numerals for all page numbers, dates, figures, diagrams, addresses.

■ For numbers below ten, words tend to be preferred to numerals.

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