Concept explainers
To find whether the number 7 is prime or composite.
Answer to Problem 24E
The number is prime.
Explanation of Solution
Given Information: Number 7.
Formula used: To check if the numbers is prime or composite ,find its factors. If its factors are more than 2(except 1 and the number itself), then the number is composite else prime.
Calculation:
To determine if 7 a prime number or a composite number, simply look at the factors for 7.
If the factors of 7 are only 7 and 1, then 7 is a prime number. Otherwise, 7 is a composite number.
The factors of 7 are as follows:
1, 7
Therefore, since 7 is divisible by only one and itself, the number is prime.
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Holt Mcdougal Larson Pre-algebra: Student Edition 2012
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