Used and loved by millions
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
a number of various
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "a number of various" is not correct and is generally considered redundant in written English.
You can use it when trying to describe multiple items or options, but it is better to choose one descriptor to avoid redundancy. Example: "There are a number of various options available for you to choose from."
⚠ May contain grammatical issues
Science
News & Media
Encyclopedias
Academia
Wiki
Formal & Business
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
60 human-written examples
Advanced nuclear power plants are currently being proposed with a number of various designs.
A number of various modeling methodologies and modeling designs have been proposed including neural networks, fuzzy, and neurofuzzy models.
Science
In a grounded mode a number of various carbon nanostructures are formed depending on the probe location in flame.
Science
There are a number of various paint programs (such as Microsoft Paint) which are well-known for accomplishing similar functions as our design.
Academia
Our body must defend itself against many different disease-causing substances such as viruses, bacteria, and parasites, as well as tumors and a number of various harmful agents.
Academia
Of the larger ring heterocycles, the most important are the crown ethers, which contain one or more heterocyclic rings comprising 12 or more ring atoms and involving a number of various heteroatoms, usually nitrogen, oxygen, or sulfur.
Encyclopedias
Since each industry has a unique set of characteristics which evidently drive the design supply chain network, a number of various models have been formulated to meet the needs of such business contexts.
A number of various designs of growth crucible are examined showing that optimized triple-electrode system is capable to provide perfectly uniform growth rate distribution over a large portion of the surface of the growing crystal.
Science
A recently proposed coenzyme regeneration system employing laccase and a number of various redox mediators for the oxidation of NAD(P H was studied in detail by kinetic characterization of individual reaction steps.
A precise knowledge of these quantities for a number of various materials is necessary to estimate the limits for stable flow conditions on the basis of complex numerical simulation programs.
Science
A number of various empirical formulas describing power spectral density of across-wind load at vortex excitation depending on flow conditions, range of Reynolds number, and lock-in phenomenon or its absence can be found in the literature.
Expert writing Tips
Best practice
Avoid using the phrase "a number of various" in formal writing. Opt for more concise and grammatically correct alternatives such as "several different" or "a variety of".
Common error
The primary error is the redundancy of using both "a number of" and "various" together. Choose one or the other to avoid unnecessary repetition. For example, prefer "a number of options" or "various options" rather than "a number of various options".
Source & Trust
80%
Authority and reliability
2.8/5
Expert rating
Real-world application tested
Linguistic Context
The phrase functions as a determiner followed by an adjective, attempting to quantify and describe a set of items. However, Ludwig AI points out that it's redundant since both "a number of" and "various" suggest multiplicity.
Frequent in
Science
43%
News & Media
25%
Wiki
5%
Less common in
Encyclopedias
5%
Academia
5%
Formal & Business
2%
Ludwig's WRAP-UP
In summary, while the phrase "a number of various" appears frequently across diverse sources, it's generally considered grammatically redundant. Ludwig AI suggests opting for more concise alternatives like "several different" or "a variety of" to enhance clarity and precision in writing. Its prevalence suggests common usage, but adhering to grammatical best practices improves overall communication effectiveness. The phrase's presence in both scientific and general contexts indicates a neutral register, although formal writing benefits from the suggested alternatives.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
several different
Replaces "a number of" with "several" and "various" with "different" to avoid redundancy.
a variety of
Substitutes the entire phrase with "a variety of", which is more concise and grammatically sound.
numerous distinct
Replaces "a number of" with "numerous" and "various" with "distinct" for a more formal tone.
many diverse
Uses "many" instead of "a number of" and "diverse" for "various", providing a simpler alternative.
multiple kinds of
Specifies "kinds of" to clarify the nature of the variations, replacing the vagueness of "various".
assorted types of
Emphasizes the assortment and different types, offering a more descriptive alternative.
a range of
Focuses on the breadth of options or items, simplifying the original phrase.
a collection of different
Highlights that there is a collection of different things.
several kinds of
Highlights the existence of different types of something.
various sorts of
Focuses on different types or categories in a short way.
FAQs
What are some alternatives to "a number of various"?
You can use alternatives like "several different", "a variety of", or "numerous distinct" to avoid redundancy.
Is it grammatically correct to use "a number of various"?
No, the phrase "a number of various" is considered grammatically incorrect due to the redundant use of "a number of" and "various". It's better to choose one or the other.
How can I use "a variety of" instead of "a number of various"?
Replace the entire phrase with "a variety of" followed by the noun you are describing. For example, instead of "a number of various methods", use "a variety of methods".
What's the difference between "various" and "a number of various"?
"Various" simply means different or diverse. "A number of various" is redundant because "a number of" already implies multiple items. Using just "various" is more concise and grammatically sound.
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
80%
Authority and reliability
2.8/5
Expert rating
Real-world application tested