The sum of the first 20 terms common between the series 3 + 7 + 11 + 15 + and 1 + 6 + 11 + 16 + is

JEE Main 2014 Mathematics question

The sum of the first 20 terms common between the series and is

Answer: (2)

The first series has common difference 4 and the second 5, so the terms they share form an A.P. with common difference . The first

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Question ID VK-104499