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Archive | Series and Sequences

GRE Math Video Lessons: Advanced Series and Counting

What is the sum of the first 50 positive integers?  (A)  1000 (B)  1225 (C)  1275 (D) 1400 (E)  1450 This is a daunting question, perhaps akin to the question that asks about two trains traveling at varying rates headed in the same direction. Just like the speeding locomotive question, this type of question should […]

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