Use some thinking to answer the following question. There are different 5 circles. What is the number of the greatest possible points with which the circles intersect?\nOptions:\n(A) 20\n(B) 10\n(C) 15\n(D) 22\n(E) 21
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Maximum points of intersection between n different circles = n*(n - 1) = 5*4 = 20 So the final answer is (A).
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