you are taking the following test:

Grade: 6,    Subject: Math,    Topic: Mean,Median and Mode
 Question 1: The temperature of a city in degree Celsius over a week was: 18, 19, 20, 20, 18, 21, and 20. What was the mean temperature? 12.8 18.4 19.4 20
 Question 2: The temperature of a city in degree Celsius over a week was 18, 19, 20, 20, 18, 21, and 20. What is the median? 20 19 18 16
 Question 3: The temperature of a city in degree Celsius over a week was 18, 19, 20, 20, 18, 21, and 20. What is the range of the temperature recorded over the week? 5 3 10 2
 Question 4: Ages of 7 teachers teaching in a middle school are: 25, 29, 30, 33, 40, 44 and 48 years. What is the mean average of their ages? 32.5 35.57 30.5 24.37
 Question 5: Ages of 7 teachers teaching in a middle school are: 25, 29, 30, 33, 40, 44 and 48 years. What is the range of the set of ages? 23 33 24 22
 Question 6: Mean of Eva's 6 test scores is 85. What is the sum of the test scores? 420 410 500 510
 Question 7: What is the mode in the following set of points scored in a series of football games? 7, 12, 17, 20, 8, 7, 18. 6 7 8 5
 Question 8: The median number of a set of 7 numbers is 65.The mode is 85 and the range is 12. How many numbers are more than the median number? 5 4 3 2
 Question 9: The manager of a book store recorded the following number of books sold per day over a week: 121, 115, 135, 118, 125, 121, 130. What is the mode? 121 120 118 115