



 
Hi Melissa. If a straw can only be used for one shape at a time, you can just think of it this way: (b) There are four sides to a square. So I need four straws for each square. I have 60 straws. So I have to divide them into groups of 4. 60 divided by 4 is 15. So I can make 15 squares. Try the others now. Hope this helps,  


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