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Sum of numbers

Number Theory Level pending

Find the sum of all distinct four digit numbers that can be formed using the digits 1,2,3,4,5, each digit appearing at most once.

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

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including olympiad champions, researchers, and professionals.

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by Ganesh Raghunathan

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