Which of these numbers is composite? 11, 27, 29, 43, 47.
Understand the Problem
The question is asking to identify which of the provided numbers is composite. A composite number is defined as a positive integer that has at least one positive divisor other than one or itself, meaning it can be divided evenly by another number.
Answer
4
Answer for screen readers
The composite number identified is 4 (if provided in the numbers).
Steps to Solve
- Identify the Numbers
List all the numbers provided in the question. This allows us to analyze each one to determine if it is composite.
- Define Composite Numbers
Recall the definition of composite numbers: A composite number has more than two positive divisors. This means that in addition to 1 and itself, it can be divided evenly by at least one other integer.
- Examine Each Number
Check each number from the list to see if it can be divided by any number other than 1 and itself:
- For example, if you have the number 4, check the divisors: $1, 2, 4$. Since it can be divided by 2 (other than 1 and itself), 4 is composite.
- Count the Divisors
For each number, make a list of its divisors and count them. If a number has three or more divisors, it is a composite number.
- Conclusion
Once you've examined all the numbers, identify which number(s) are composite based on your findings.
The composite number identified is 4 (if provided in the numbers).
More Information
Composite numbers start from 4, as 1, 2, and 3 are not composite (1 has only one divisor, and 2 and 3 are prime numbers).
Tips
- Confusing composite numbers with prime numbers. Remember, prime numbers have exactly two divisors: 1 and itself.
- Not checking all divisors thoroughly, which can lead to incorrect classification of a number.
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