The first half has eight values, so the median is the average of the middle two values:Q1 = (15+15)/2 = 15.The second half also has eight values, so the median is the average of the middle two values: Q3 =(31+32)/2 =31.5
Because like terms you add or subtract together to make it easier to do the problem. just like you do with whole numbers. you add an subtract to make the answer simpler.
