Classify the below numbers based on whether they are perfect square or not.
64, 9, 81, 100, 57, 16
Perfect square - 64, 9, 81, 16
Not perfect square - 100, 57
Instruction: Classify the below numbers based on whether they are perfect square or not.
64, 9, 81, 100, 57, 16
Context: 
Response: Perfect square - 64, 9, 81, 16
Not perfect square - 100, 57