There are red balls, blue balls and white balls in a box. The number of white balls is at least 1/3 of blue balls and does not exceed 1/4 of red balls. The sum of blue balls and white balls is at least 129. What is the minimum number of red balls?

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 over 5 million people

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

Your answer seems reasonable.
Find out if you're right!