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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, interactive explorations.

Used and loved by over 7 million people

Learn from a vibrant community of students and enthusiasts,
including olympiad champions, researchers, and professionals.

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Basic Mathematics

Ratio, Rate, and Proportion

Concept Quizzes

Simplifying Ratios
Finding Unknowns
Direct Variation
Inverse Variation
Word Problems - Basic
Problem Solving

Challenge Quizzes

Level 1
Level 2

Simplify Ratios

Which of the following is equal to

$1 : 2?$

6 : 1 3 : 6 1 : 6 6 : 3

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by Brilliant Staff

True or False?

The ratios $6 : 10$ and $3 : 5$ are equivalent.

True False

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by Brilliant Staff

Which of the following is equal to

$15 : 25?$

25 : 15 1 : 5 1 : 3 3 : 5

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by Brilliant Staff

Which of the following ratios is in lowest form?

16 : 14 8 : 7 14 : 16 56 : 14

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by Brilliant Staff

True or false?

The ratios $8 : 17$ and $2 : 5$ are equivalent.

False True

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by Brilliant Staff

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