Find the deletion

Discrete Mathematics Level 1

a, b, c, d and e are five consecutive integers in increasing order. When we delete one of the 5 from the set, then the sum of the numbers would have decreased by 20%

Which one of the numbers was deleted from the set?

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Find the deletion

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Courses

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Community

100 Day Summer Challenge

Find the deletion

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.