PUNS:

Punblrings done by some college kids:
reversemermaid.tumblr.com and pacific-dissonance.tumblr.com

The guy we stole the URL from: attentiondoozers.tumblr.com

1. 

    44

    
   
    

   math trigonometry 

2. 

    52

    
   
    

   math trigonometry sign pick up lines pi 

3. 

    9

    
   
    

   math trigonometry 

4. 

    108

    
   
    

   trigonometry Bill Cosby