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Welcome to the AoPS Wiki!

The AoPS Wiki project is administered by the Art of Problem Solving for supporting educational content useful to avid math students.

During AMC 10/12 testing week, the AoPS Wiki is in read-only mode. No edits can be made.

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Problem of the Week

2013 AMC 8, Problem 7

Trey and his mom stopped at a railroad crossing to let a train pass. As the train began to pass, Trey counted 6 cars in the first 10 seconds. It took the train 2 minutes and 45 seconds to clear the crossing at a constant speed. Which of the following was the most likely number of cars in the train?

Recent Changes

• 2017 AMC 10B Problems/Problem 22‎
• Connecticut Mathcounts‎
• User:AlmaFowler6‎
• 1999 AIME Problems/Problem 15‎
• User:EliasCobb24‎

• More...

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