Talk about Spreadshirt (2009-11-24, 19:18:02):
Can't wait for my GA t-shirt to come! http://image.spreadshirt.net/image-server/image/product/16420254/view/1/type/png/width/130/height/130
A Spreadshirt shop has sold a certain number of t-shirts this year. It has sold half its t-shirts and one more to the first buyer. It sold half the remainder and one more to the second buyer. It sold half the remainder and one more to a third buyer, and finally half the remainder and one more to a forth buyer.
How many shirts has this Spreadshirt shop sold this year?
Classic, casually cut T-shirt, 100% combed cotton Softhanded screen print
American Apparel classic T-Shirt, 100% cotton Softhanded screen print
American Apparel classic T-Shirt, 100% cotton 
Ami
Dave
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30
yes 30
Congratulations to both Michel and Kenny for getting the correct answer!