Odd- and Even-numbered Terms

Algebra Level 3

Let \(a_1, a_2, a_3, \ldots a_{2n}, a_{2n+1}\) be an arithmetic progression. If the sum of all the odd-numbered terms is \(130\) and the sum of all the even-numbered terms is \(117,\) what is \(2n+1?\)

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Odd- and Even-numbered Terms

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100 Day Summer Challenge

Odd- and Even-numbered Terms

Excel in math and science

Master concepts by solving fun, challenging problems.

It's hard to learn from lectures and videos

Learn more effectively through short, conceptual quizzes.

Our wiki is made for math and science

Master advanced concepts through explanations, examples, and problems from the community.

Used and loved by 4 million people

Learn from a vibrant community of students and enthusiasts, including olympiad champions, researchers, and professionals.

Master advanced concepts through explanations,
examples, and problems from the community.

Learn from a vibrant community of students and enthusiasts,
including olympiad champions, researchers, and professionals.

Master advanced concepts through explanations,
examples, and problems from the community.

Learn from a vibrant community of students and enthusiasts,
including olympiad champions, researchers, and professionals.