“全美国最著名大学有机所？”用英语怎么说？

How many famous universities are there in the US

中英文语言习惯不同，英文中“最”的东西只有一个，因此不能用最高级提问。

Which college is the most famous college in the united states ?how many colleges like that does the USA have？
大概这样吧。。。

How many famous universities are there in America?

How many famous universities are there in the US?