Twenty vs. 20: When to Type Out a Number and When to Use the Numeral

General Rules

1. Numbers from One to Nine

Write out numbers from one to nine: This is a common rule in English writing, especially in more formal contexts.

Example: "She has three dogs."

2. Numbers 10 and Above

Use numerals for numbers 10 and above: This helps make the text clearer and easier to read.

Example: "The class has 25 students."

Exceptions to the General Rules

1. Beginning of a Sentence

Always write out numbers at the beginning of a sentence, regardless of size.

Example: "Twenty people attended the meeting."

2. Consistency in a Series

Be consistent when writing numbers in a series: If your text includes a list or series of numbers, use the same format for all.

Example: "We need 15 chairs, 10 tables, and 5 lamps."

3. Formal Writing

Spell out numbers in formal writing: This includes academic papers, legal documents, and literary texts.

Example: "The report stated that twenty percent of students excel in mathematics."

4. Informal Writing and Technical Contexts

Use numerals in informal writing or technical contexts: This is common in business reports, scientific writing, and online content.

Example: "We expect 50% growth next year."

5. Large Numbers

Combine words and numerals for large numbers: This makes large numbers easier to read.

Example: "The population of the city is 1.2 million."

Common Errors

1. Mixing Formats

Incorrect: "We have 5 apples, fifteen oranges, and 20 bananas."

Correct: "We have 5 apples, 15 oranges, and 20 bananas."

2. Starting Sentences with Numerals

Incorrect: "20 people attended the event."

Correct: "Twenty people attended the event."

3. Inconsistent Usage

Incorrect: "There were 4 cats, eight dogs, and 12 birds."

Correct: "There were 4 cats, 8 dogs, and 12 birds."

Examples

Here are some examples to help clarify when to use words and when to use numerals:

- Numbers from one to nine: Use words. Example: "Three apples."

- Numbers 10 and above: Use numerals. Example: "15 cars."

- Beginning of a sentence: Use words. Example: "Forty students attended."

- Consistency in a series: Be consistent and use numerals. Example: "7 chairs, 15 tables."

- Formal writing: Use words. Example: "Twenty percent increase."

- Informal or technical writing: Use numerals. Example: "50% growth."

- Large numbers: Combine words and numerals. Example: "1.2 million people."

FAQ

When should I write out numbers in formal writing? 

In formal writing, write out numbers from one to nine and use numerals for numbers 10 and above. Also, write out numbers at the beginning of a sentence.

Are there different rules for informal writing? 

Yes, in informal writing or technical contexts, using numerals is more common, especially for clarity and ease of reading.

How should I write large numbers? 

Combine words and numerals to make large numbers easier to read, like "1.2 million" or "3.5 billion."

What if I have a series of numbers in a sentence? 

Be consistent in your formatting. If you start using numerals, continue with numerals throughout the series.

Can I start a sentence with a numeral? 

No, always write out the number if it is at the beginning of a sentence.