1. The number 6 is a factor of 42. What number must be paired with 6 to form a factor pair of 42? The factor pair is (6, ___).
2. Which of the following is a factor pair of 28?
3. Since $8 \times 5 = 40$, the numbers 8 and 5 are factors of what product? The product is ___.
4. Based on the definition of a factor, which of these numbers is a factor of 35?
5. The number 24 has several factor pairs. Which of the following is NOT a factor pair of 24?
6. Since $6 \times 8 = 48$, the number 6 is a factor of ___.
7. Which of the following is a factor pair of 28?
8. The number 5 is a factor of 35. The other number that completes the factor pair $(5, \_\_\_ )$ is ___.
9. If $x$ and $y$ are factors of $z$, which equation must be true?
10. Given the equation $9 \times 4 = 36$, the number 4 is a factor of ___.