A Divisibility Difference

Algebra Level 1

If we take a certain 2-digit integer and reverse its digits to form another 2-digit integer, the absolute difference between these two numbers is always divisible by which of the following numbers?

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100 Day Summer Challenge

A Divisibility Difference

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Community

100 Day Summer Challenge

A Divisibility Difference

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.