Tamtam collected 65 shells in total. She got 13 purple shells, 8 pink shells, 18 yellow shells, and 12 blue shells. The remaining shells are color orange. How many orange shells are there?
Tamtam has a total of 13 + 8 + 18 + 12 = <<13+8+18+12=51>>51 shells that are not orange.
Therefore, Tamtam has a total of 65 – 51 = <<65-51=14>>14 orange shells.
#### 14