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Agreed. A plain number as an answer could give you zero points. It is always UNITS UNITS UNITS. 10 what? Kg? Apples? kW?

I remember actually a chemistry test where I did not use units in an important calculation but only in the answer. If I had used units I would have realized that I totally fucked up. I went belly up. :-(

Dimensional analysis was part of my degree but honestly, I remember little.

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I had a high school physics teacher who would have the instructions "Answer in SI units unless specified" at the top of his exams, but there was always a last bonus problem that referenced the previous answer and promised extra credit equal to a full problem for the answer in "most creative or interesting units (with work shown)". It was a competition in the class for the extra credit and he'd typically award 1-3 of the answers full extra credit.

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