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Sample Question 20:
The number 2013 is expressed in the form 2013=b1!b2!⋯bn!a1!a2!⋯am!, where a1≥a2≥⋯≥am and b1≥b2≥⋯≥bn are positive integers and a1+b1 is as small as possible. What is ∣a1−b1∣?
(A) 1(B) 2(C) 3(D) 4(E) 5
Answer Keys
Question 20: B