Is 21 composite?
Understand the Problem
The question is asking if the number 21 is a composite number. A composite number is a positive integer that has at least one positive divisor other than one or itself. In this case, we will determine the factors of 21 to verify if it is composite.
Answer
21 is a composite number
The final answer is that 21 is a composite number.
Answer for screen readers
The final answer is that 21 is a composite number.
More Information
A composite number is one that has more than two factors. The factors of 21 are 1, 3, 7, and 21, indicating it has more than two factors.
Tips
Common mistakes include confusing composite numbers with prime numbers, which have exactly two factors.
Sources
- Is 21 a Composite Number? [SOLVED] - Math Warehouse - mathwarehouse.com
- Is 21 a prime number or a composite number? - Homework.Study.com - homework.study.com
- Is 21 a Prime or Composite Number? - Cuemath - cuemath.com
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