# If it took 10 minutes to saw a board into 2 pieces, how long will it take to saw another into 3 pieces?

So this is supposed to be really simple, and it's taken from the following picture:

Text-only:

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

I don't understand what's wrong with this question. I think the student answered the question wrong, yet my friend insists the student got the question right.

I feel like I'm missing something critical here. What am I getting wrong here?

• This is simultaneously wonderful and sad. Wonderful for the student who was level-headed enough to answer this question correctly, and sad that this teacher's mistake could be representative of the quality of elementary school math education. May 3, 2013 at 3:38
• I took five minutes per cut. One cut yields two pieces. Two cuts yield three pieces. And so on..... May 3, 2013 at 4:40
• I think the issue is that the language and image are incongruent. The question should have been "10 minutes to saw 2 pieces from a board" (2 cuts), then the teachers answer would be correct. As it is stated, it implies sawing a board in half (1 cut). May 3, 2013 at 5:23
• The language and the image are in perfect agreement- the image shows two pieces resulting from a single cut.
– JayL
May 3, 2013 at 8:01
• By the way, originally this was posted as "Teacher Math Fail" at zerooutoffice: zerooutoffive.blogspot.com/2010/10/teacher-math-fail.html May 6, 2013 at 20:21