10. What is the least common multiple of 5 and 10? A.10 B. 15 C. 20 D. 25 11. Which is the lowest common multiple of 10 and 12? A.10 B. 60 C. 90 D. 120 12. How many different methods are used to find the lowest multiple of the two numbers? A. 2 B.3 C.4 D5 13. What is the lowest multiple of 15 and 20? A. 15 B. 30 C. 45 D. 60