Answer:
1. B. 2 × 3 × 3
• 2 × 3 = 6
• 6 × 3 = 18
2. D. Prime Factorization
• When a composite number is written as a product of all of its prime factors, we have the Prime Factorization of the number.
3. D. 16
• 2 × 2 = 4
• 4 × 2 = 8
• 8 × 2 = 16
4. C. 9
• 9 = 9
• 18 = 9, 18
• 27 = 9, 18, 27
5. A. 18
• 6, 12, 18
• 9, 18
6. C. 40
• (1, 40), (2, 20), (4, 10) and (5, 8).
7. B. GCF
• The greatest common factor (GCF) of a set of numbers is the largest factor that all the numbers share.
8. D. 24
• 8, 16, 24
• 6, 12, 18, 24
9. A. 2 and 5
• 1, 2, 5, 10 are the factors of 10.
10. A. Composite Numbers
• A number with more than two factors is called a composite number. The number 1 is neither prime nor composite.
