Median: 23.5 12 and 35 are in the middle so you add them and divide by 2, leaving you 23.5 as your median. Mean: 41.3 Add all numbers together and divide the sum by the number of numbers added. So all numbers added together equals 413. Divide by ten the nuber of numbers added. 413/10 equals 41.3. Mode: 99 The number that appears most often. In this case, 99 would be the mode. Range: 98 The lowest number subtracted from the highest number. 99-1 equals 98. IQR: 84.75