How long will it take Marie to saw another board into 3 pieces? So this is supposed to be really simple, and it's taken from the following picture:

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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?

Teaching children, you have to be fair to them: 


*

*Think as they do.

*Third graders are budding topologists, just very far from graduation.

*Children are honest and direct in their assessments - it would not likely occur to them to "cut into 3 pieces of equal length" because that was not in the question. Nether would they likely think of any of the alternative cuts offered here in the various answers --- precisely because:

*People (especially children) tend to be very visual. DUH there is a picture of the saw cutting the board. The board IS a board, not a paper cut out, not a piece of rectangular plywood; and the way the saw is positioned very strongly implies the next cut would be made in a similar fashion. Honestly, how many of you looked at that picture and almost unconsciously imagined moving the saw to the right (or maybe to the left) of the current cut ? I did - and I bet the children would too ... because:

*Children are hands on.
When I read the problem, I thought the test grader just muffed it misreading the scoring sheet.  Wow - I guess I'm childish :-P  
