Find factor pairs for numbers to 100, and use understanding of factors to define prime and composite. Practice — Grade 4 math

Lesson 1: Find factor pairs for numbers to 100, and use understanding of factors to define prime and composite. — Practice Questions

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?
- A. (3, 9)
- B. (4, 7)
- C. (5, 6)
- D. (2, 12)
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?
- A. 4
- B. 6
- C. 7
- D. 8
5. The number 24 has several factor pairs. Which of the following is NOT a factor pair of 24?
- A. (3, 8)
- B. (4, 6)
- C. (2, 12)
- D. (3, 9)
6. Since $6 \times 8 = 48$, the number 6 is a factor of ___.
7. Which of the following is a factor pair of 28?
- A. (3, 9)
- B. (4, 7)
- C. (5, 6)
- D. (2, 12)
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?
- A. $x + y = z$
- B. $x \times z = y$
- C. $x \times y = z$
- D. $y - x = z$
10. Given the equation $9 \times 4 = 36$, the number 4 is a factor of ___.