I think that the reason that 7 is so high is because it is commonly believed that 3 will is the first one you think of. As a result people choose to pick something higher, hence 4 and 7 being the top two.
There's also http://www.cookingforengineers.com/
I think that the reason that 7 is so high is because it is commonly believed that 3 will is the first one you think of. As a result people choose to pick something higher, hence 4 and 7 being the top two.
There's also http://www.cookingforengineers.com/