Question: There are different 45 circles. What is the number of the greatest possible points with which the circles intersect?
Options:
(A) 1950
(B) 2000
(C) 1980
(D) 1580
(E) 2600 Let's think first. Some random reasoning:
Maximum points of intersection between n different circles = n*(n - 1) = 45*44 = 1980 The final answer: (C).