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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
3
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "3" is not correct or usable in written English as it stands alone without context.
It can be used as a numeral in various contexts, such as counting, listing, or indicating a quantity.
Example: "There are 3 apples on the table."
Alternatives: "three" or "a trio of".
⚠ May contain grammatical issues
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified similar examples from authoritative sources
Similar Expressions
60 human-written examples
KC kick off... 9.24pm GMT The Cauldron Paolo Bandini (@Paolo_Bandini) Loving the Super Mario themed choreography from the @KCCauldron #MLSCup @Busfield pic.twitter.com/gh7vmTIdYI December 7 , 20139.23pm GMT Final reminder Your chance to celebrate/complain/argue/joke with others watching this game via this liveblog, email [email protected] or via Twitter to @Busfield.
News & Media
While the organization keeps in touch with its donors throughout the year, an extra e-mail message goes out on Dec. 29, a final reminder that if a donor wants a tax deduction that year, he or she better make it fast.
News & Media
This study revealed that response among those sent a shorter four-page version (23 items) in the final reminder mailing was greater than those who were only sent the full 12-page questionnaire containing 88 items (responses of 14.8% and 7.2% respectively) [ 22].
3 Days Before: Make a final reminder call to all persons attending.
Wiki
Although the anonymous nature of the current study precluded the use of reminders, this should be employed in further studies to maximize response rates including the use of handwritten envelopes, the provision of free post address envelopes, postcard reminders, use of telephone reminders and provision of a questionnaire at final reminder stage [ 16, 29, 40- 43].
6 how have we had a final reminder of the labial requirements of whistling?
News & Media
Reminders were sent at 10 and 20 days after the initial contact, with a final reminder sent three days preceding the survey's close.
Science
Furthermore, in a follow-up study in older children (which therefore used the operant conditioning train paradigm), acquisition of the task occurred when infants were 6-months-old, followed by five spaced reminders in the intervening period (with the final reminder occurring at 18-months of age).
Up to three reminders were sent at 7 day intervals to non-responders, with the final reminder containing a request for participants to tell us their past week alcohol consumption only.
Science
If that trend continues for Q4, it's the ideal time to issue one final reminder before putting this whole messy business of exploding smartphones behind it.
News & Media
A final reminder letter offered families a £10 incentive gift voucher for the return of their accelerometer.
Science
Expert writing Tips
Best practice
When using "3", ensure it's part of a complete sentence or phrase. Provide context to avoid ambiguity. For example, "There are 3 apples." or "Step 3: Mix the ingredients."
Common error
Avoid using "3" as a standalone statement. It lacks context and grammatical structure. Always include it within a sentence or phrase to provide meaning.
Source & Trust
79%
Authority and reliability
2.8/5
Expert rating
Real-world application tested
Linguistic Context
As a numeral, "3" typically functions as a determiner quantifying a noun, or as a noun itself representing the number three. Ludwig AI indicates its standalone usage is often incomplete and requires context.
Frequent in
Science
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News & Media
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Formal & Business
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Less common in
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News & Media
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Formal & Business
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Ludwig's WRAP-UP
The numeral "3" is a fundamental element for expressing quantity and sequence. However, Ludwig AI indicates that using "3" in isolation is grammatically incomplete. To use it correctly, ensure it's part of a complete sentence providing context, such as "There are 3 apples" or "Step 3: Mix the ingredients". When writing formally, consider spelling out the number as "three". While "3" is essential, remember to provide sufficient context for clarity.
Alternative expressions
Phrases that express similar concepts, ordered by semantic similarity:
three
The word form of the numeral, suitable for sentences requiring spelled-out numbers.
item number three
Indicates the third item in a list or sequence.
the number three
A more explicit way of referring to the numeral.
third
Represents the ordinal form of the number, indicating position in a sequence.
group of three
Emphasizes the quantity as a collective.
a trio of
Refers to a group of three items or individuals.
FAQs
How to use "3" in a sentence?
Use "3" as a numeral within a sentence, such as "I have 3 cats" or "The recipe requires 3 eggs."
What can I say instead of "3" if I need to spell it out?
You can use "three", which is the word form of the numeral.
Is it correct to start a sentence with "3"?
Starting a sentence with a numeral like "3" is generally discouraged in formal writing. It's better to spell it out as "three" or rephrase the sentence.
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Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
79%
Authority and reliability
2.8/5
Expert rating
Real-world application tested