1. The problem asks us to identify which factors of 70 are not prime. 2. Recall that a prime number is a number greater than 1 that has no positive divisors other than 1 and itself. 3. The factors of 70 given are: 1, 2, 5, 7, 10, 14, 35, and 70. 4. Check each factor: - 1 is not prime by definition. - 2 is prime (divisible only by 1 and 2). - 5 is prime. - 7 is prime. - 10 is not prime (divisible by 1, 2, 5, 10). - 14 is not prime (divisible by 1, 2, 7, 14). - 35 is not prime (divisible by 1, 5, 7, 35). - 70 is not prime (divisible by 1, 2, 5, 7, 10, 14, 35, 70). 5. Therefore, the factors of 70 that are not prime are: 1, 10, 14, 35, and 70. Final answer: The non-prime factors of 70 are $1, 10, 14, 35,$ and $70$.