If 9 people are standing in a straight line, what is the smallest number of people who must move so that all 9 will be standing on the circumference?

Question

anonymous · Answer

Circumference of what? a random circle? or a particular one?

anonymous · Answer

Yea of a circle.

anonymous · Answer

I want to say 7 people need to move.  Make the first and last person the endpoints of your diameter.  Then the 7 people between them just gotta move off the diameter to the circle.

anonymous · Answer

sounds right but im not sure

anonymous · Answer

Oh wow thats all there is to it? lol