A1. A figure consists of three circles and two lines. What is the maximum number of intersection points?
A) 15
B) 16
C) 18
D) 19
E) 20
A1. D) 19 Two circles can intersect at most at 2 points, a circle and a line can intersect at most at 2 points, and two lines can intersect at most at 1 point. Therefore, there cannot be more than \(6+6+6+1=19\) intersection points. That this number can also occur, you can see from the image below.

![](https://cdn.mathpix.com/cropped/2024_04_17_eb67361d5b5f4c2be0e0g-1.jpg?height=232&width=374&top_left_y=815&top_left_x=1481)