The median is the middle number within a sequence of numbers listed from least to greatest.
21, 22, 23, 24.
An easy way to find the median is to cross out the smallest number and the biggest number. Keep doing this until you can no longer do it.
21 and 24 get crossed out, now we are left with 22 and 23.
Cross out 22 and 23.
If there are no numbers left, average the last 2 numbers you crossed out.
22 + 23 = 45
45/2 = 22.5
22.5 is your median.
