Concept explainers
To find whether the number is prime or composite.
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Answer to Problem 10E
The number is prime.
Explanation of Solution
Given Information:Number 23.
Formula used: To check if the numbers is prime or composite by finding 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 23 is a prime number or a composite number, simply look at the factors for 23.
If the factors of 23 are only 23 and 1, then 23 is a prime number. Otherwise, 23 is a composite number.
To explain better, if 23 is only divisible by 1 and 23, then it is a prime number, and if 23 is divisible by more than 23 and 1, then it is a composite number.
The factors of 23 are as follows:
1, 23
Therefore, since 23 is divisible by only one and itself, the number is prime.
Chapter 4 Solutions
EBK PRE-ALGEBRA
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