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Sum

Discrete Mathematics Level 1

Find the sum of all 4-digit numbers formed by using the digits 1, 2, 3, 4, 5 and where no digit is to be repeated in any 4-digit number.

2,99,960 3,99,960 3,98,888 2,98,888

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 Aman Baser

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