Of the following numbers, which one is prime: 32, 42, 29, 15?
Mathematics · High School · Wed Jan 13 2021
Answered on
Given the numbers:
32, 42, 29, 15
Determine which one of the numbers is prime.
Solution:
In order to determine which number is prime, we simply need to list the factor of the numbers. It must be taken to note that if there are more than 2 factors then the number is composite, hence if there are only two factors, mainly the number itself and 1, then the number is a prime number.
Factors of 32:
1, 2, 4, 8, 16, and 32 (Composite)
Factors of 42:
1, 2, 3, 6, 7, 14, 21, and 42 (Composite)
Factors of 29:
1 and 29 ( Prime)
Factors of 15:
1, 3, 5, 15 (Composite)
Final answer:
29