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GSM8K / A teacher uses a 5-inch piece of chalk to write math equations on a chalkboard…

Problem

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question

A teacher uses a 5-inch piece of chalk to write math equations on a chalkboard for his students. The teacher likes to conserve chalk, so he tries to only use 20% of the chalk each day. Since the teacher cannot write with a very small piece of chalk, he recycles the chalk when it is smaller than 2 inches. On Monday the teacher used a new piece of chalk. His students need extra help that day, so he ended up writing more than usual. He used up 45% of the chalk by the end of the day. If the teacher goes back to using only 20% of the chalk each day, how many days does he have before he has to recycle this piece?

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Source and history

task_id
32bdbd8d-4c25-580a-8b1d-3949480a672b
task_key
main--test--32bdbd8d-4c25-580a-8b1d-3949480a672b
task_revision_id
1
config / split
main / test

Official source

initial import