Write the letter of the correct answer. 1. Which of the following is greatest common factor of 20 and 50? a. 10 b. 20 c. 15 d. 5 2. Linda has 36 cups and 18 glasses. If she will put in a tray with same number of cups and glass, what is the biggest possible number of cups and glasses that the tray will containe a. 7 b. 18 c. 27 d. 36 3. Which of the following is least common multiple of 3,9, and 12? a. 36 b.27 c. 32 d. 17 4. Which of the following is greatest common factor of 72 and 1122 a. 72 5.36 c. 6 d. 8 5. Which of the following is least common multiple of 18, 36, and 722 a. 72 b. 45 c. 36 d. 92​