Find the median:

1

8

4

30

39

16

33

18

7

5

11

13

12

Step-by-step explanation:

1). Order the numbers from least to greatest

2). Elliminate one number from each side until you reach the middle

3). Since there are 2 numbers in the middle, we add the up (11+13) and divide them by 2

12

Step-by-step explanation:

line the numbers up and cross off the first and last until you get to the middle. 11 and 13 were in the middle. 12 is between those numbers.