Directions: Write the letter of the correct answer. 1. Which of the following is a factor pair of 72? A. 8 and 9 B.12 and 7 C. 36 and 36 D. 9 and 7 2. The following numbers are all of 5 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, and 60 A. answers B. factors C. multiples D. prime numbers 3. Which of the following is NOT a factor of 40? A 4 B. 5 C. 8 D. 9 4. How many factor pairs are there for the number 28? A.2 B. 3 C.4 D.6 5. Which of the following is a prime number? A. 73 B. 72 C. 58 D. 54 6. How many factors does 12 have? A.5 B. 6 C. 7 D. 8 7. Which of the following numbers is prime? A. 4 B. 17 C. 24 D. 100 8. Which is a prime number? A.1 B. 5 C. 15 D. 25 9. Which list shows multiples of 4? A. 1, 2,4 B. 1,3,4,5 B. 1, 3, 4, 5 C. 4, 8, 12, 16 D. 2, 4, 6, 8 10. 28, 35, 42, 49 and 56 are all multiples of which number? A. 7 B. 3 C. 12 D. 8​