Canada National Olympiad Problem 1

Discrete Mathematics Level 5

What is the maximum number of non-overlapping \( 2\times 1\) dominoes that can be placed on a \( 8\times 9\) checkerboard if six of them are placed as shown?

Each domino must be placed horizontally or vertically so as to cover two adjacent squares of the board.

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Canada National Olympiad Problem 1

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100 Day Summer Challenge

Canada National Olympiad Problem 1

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.