Give a quick stream of consciousness before answering the following question. There are different 6 circles. What is the number of the greatest possible points with which the circles intersect?
Options:
(A) 90
(B) 100
(C) 110
(D) 180
(E) 30
Maximum points of intersection between n different circles = n*(n - 1) = 6*5 = 30
The answer: (E).