5. Determine the fifth number: 2, 6, 10, 14, ? B. 17 C. 18 D. 20 A 15 6. What is the sum of an odd number and even number? A. odd B. even D. composite C. prime 7. What is the sum of two even numbers? ? A. odd B. even C. prime D. composite 8. What is the sum of two odd numbers? A odd B. even C. prime D. composite 9. What is the product of two odd numbers? A. odd B. even C. prime D. composite 10. What is the product of two even numbers? A odd B. even C. prime D. composite