Johnson

Algebra Level 1

In a library, there are 12000 non-fiction, story and adventure books. The non-fiction books takes up 1/3 of the books. The ratio between non-fiction and adventure books are 2:3. How many dventure books are there.

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Johnson

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Courses

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Community

100 Day Summer Challenge

Johnson

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.