Problem-Solving and Data AnalysisMediumOutput proportional to the number of machines
Problem-Solving and Data Analysis practice question
Five identical machines make 200 parts in 4 hours. At the same rate, how many parts do 8 of these machines make in 4 hours?
Answer: 320
Each machine makes 200/5 = 40 parts in 4 hours. Eight machines: 8 × 40 = 320.
Common wrong answers
- If you answered 125
- 125 scales the wrong way (200 × 5/8); more machines make MORE parts.
- If you answered 203
- 203 adds 3 for the 3 extra machines instead of scaling.
- If you answered 640
- 640 doubles the time as well; the time is the same 4 hours.
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