65-m.p.h. Speed Limits, Large Primes, and Japanese Exams (Math Chat)
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|Frank Morgan; Christian Science Monitor|
|When a state increases a highway speed limit from 55 to 65 miles per hour, by what percent does the road capacity (in cars per hour) change?|
|Levels:||Middle School (6-8), High School (9-12)|
|Resource Types:||Problems/Puzzles, Articles|
|Math Topics:||Measurement, Prime Numbers|
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