First, line up all of the number by value, starting from least to gratesest. Then cross one out from each side untill you have only one number left or in, this case, the number between your 2 last numbers.
Explanation : line the numbers up in order Like this : 1,1,2,2,3,3,4,4 Then find the middle number Here we have two middle numbers They are 2 and 3 Therefore we find the number which is in between 2 and 3 which is 2.5.
