This is the test no. 3 from Haselbauer-Dickheiser Test.
These three circles below all have blue dots on their circumference which are connected by straight lines. These lines divide the circles into smaller regions. The first circle, with two blue dots, is separated into two regions. The second circle, with three blue dots, is separated into four regions. The third circle, with four blue dots, is separated into 8 regions.
Given a circle where seven blue dots are placed anywhere on its circumference, what would be the maximum number of regions into which it could be divided?