A composite number is a positive integer greater than 1 that has more than two positive divisors. In other words, it can be divided evenly by numbers other than 1 and itself.
Among the given numbers:
- 15 is composite because it can be divided evenly by 1, 3, 5, and 15.
- 17, 19, and 23 are prime numbers because they can only be divided evenly by 1 and themselves.
So, the composite number among 15, 17, 19, and 23 is 15.
Answer:
15
Step-by-step explanation:
Let's check the factors of 15: 1 × 15 = 15 3 × 5 = 15 Since 15 has factors other than 1 and itself (3 and 5), it is a composite number. On the other hand, 17, 19, and 23 only have factors of 1 and themselves, so they are prime numbers. Therefore, the number that is composite between 15, 17, 19, and 23 is 15.
