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Tuesday, October 12, 2010

Teacher Math Fail


4. It took Marie 10 minutes to saw a board into 2 pieces. If she works just as fast, how long will it take her to saw another board into 3 pieces?


20 minutes X
Answer: 15

Teacher: I think you're wrong there. You see, in order to cut a board in to 2 pieces, you make 1 cut. To cut a board in to 3 pieces, you make 2 cuts. 20 minutes is right.

Any teachers out there want to fess up to making similar mistakes? Comment on this post! Or better yet, scan the document and email it to me!
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