The range of a set of numbers is the difference between the largest number and the smallest number. Take the largest number and subtract the smallest number to get the range. The median is middle value of the set of numbers. In order to get the median, the numbers have to be written in order from the least to the most. If there are an even amount of numbers, take the average of the two middle numbers, to get the median. The mode is the number that is repeated more times than any other. There can be more than one mode.