compound number: meaning, definition, pronunciation and examples
Technical / C2Formal, academic, technical
Quick answer
What does “compound number” mean?
A number that is not prime.
Audio
Pronunciation
Definition
Meaning and Definition
A number that is not prime; a number that can be formed by multiplying two smaller whole numbers greater than one.
In mathematics, a positive integer greater than 1 that has at least one positive divisor other than 1 and itself. It is also occasionally used in older arithmetic to refer to a number expressed in mixed units (e.g., pounds and shillings).
Dialectal Variation
British vs American Usage
Differences
No significant difference in the core mathematical meaning. The archaic mixed-unit sense might be slightly more prevalent in older British texts dealing with imperial currency.
Connotations
Purely mathematical/technical; no cultural connotations.
Frequency
Very low frequency in general language; appears almost exclusively in mathematical and educational contexts. Identical frequency profile in UK and US.
Grammar
How to Use “compound number” in a Sentence
[Number] is a compound number.The set of all compound numbers.To determine if a number is compound.Vocabulary
Collocations
Examples
Examples of “compound number” in a Sentence
adjective
British English
- The student struggled with the compound number problem.
- Identify all compound number values in the set.
American English
- The worksheet focused on compound number identification.
- She explained the compound number concept clearly.
Usage
Meaning in Context
Business
Virtually never used.
Academic
Used in mathematics textbooks, papers, and courses, primarily at secondary and undergraduate levels.
Everyday
Extremely rare; would only be used when discussing specific mathematical topics.
Technical
The primary domain of use. Standard term in number theory and basic arithmetic education.
Vocabulary
Synonyms of “compound number”
Vocabulary
Antonyms of “compound number”
Watch out
Common Mistakes When Using “compound number”
- Confusing 'compound number' with 'complex number' (involving the imaginary unit i).
- Using it to mean a large or complicated number in non-mathematical contexts.
FAQ
Frequently Asked Questions
Yes, in modern mathematics, 'composite number' is the more standard and frequent term. 'Compound number' is an older or less common synonym with identical meaning.
No. By definition, compound/composite numbers are integers greater than 1 that are not prime. The number 1 is neither prime nor composite.
A prime number. A prime number is a whole number greater than 1 whose only positive divisors are 1 and itself.
Historically, it could refer to a quantity expressed in more than one unit (e.g., 5 feet 3 inches). This usage is now archaic and largely replaced by terms like 'mixed measure' or simply describing the units.
A number that is not prime.
Compound number is usually formal, academic, technical in register.
Compound number: in British English it is pronounced /ˌkɒmpaʊnd ˈnʌmbə/, and in American English it is pronounced /ˌkɑːmpaʊnd ˈnʌmbər/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think of a 'compound' as something made by combining parts. A COMPOUND NUMBER is 'compounded' or made by multiplying smaller whole numbers together.
Conceptual Metaphor
NUMBERS ARE BUILDINGS: A prime number is a fundamental, indivisible block. A compound/composite number is a building constructed from those blocks.
Practice
Quiz
Which of the following is the most precise and common synonym for 'compound number' in modern mathematics?