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Everything Is Proportional

Algebra Level 1

If it takes 3 men to build 3 houses in 3 months,
then how long it takes 1 man to build 1 house?

1 month 2 months 3 months

View solutions

Excel in math and science

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It's hard to learn from lectures and videos

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Used and loved by over 6 million people

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including olympiad champions, researchers, and professionals.

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by Pi Han Goh

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