They are 4 points on the circle, and 29 on or in the circle.
3
The Black Circle has 178 pages.
There are an infinite number of points on the circumference of a circle and an infinite number of points on a semi-circle so the answer to your question is "An infinite number of pairs of points."
Lots of points don't lie on the circle. In fact, there are (in a way) more points NOT on the circle, than points on the circle.
50 points
The People of the Black Circle has 149 pages.
An infinite amount because a circle is a collection of infinite points.
50
5
Which points?
A circle does not have any points. The circle is completely rounded off.