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Trip to Boston

Math brain teasers require computations to solve.


Puzzle ID:#10475
Fun:*** (2.67)
Difficulty:** (1.74)
Submitted By:Bobbrt*****




Glenn and Steve took turns driving on a trip to Boston and back. Glenn drove the first 40 miles and Steve drove the rest of the way to Boston. On the way back, Glenn started to drive, and then Steve drove the last 50 miles.

Which of the two drove more, and how much more did he drive?

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Steve drove 20 miles more than Glenn, no matter how far the trip to Boston was. It's probably easiest to just try this with numbers:

Assume the trip to Boston is 60 miles:

Glenn: 40 miles there and 10 miles back for 50 miles total.
Steve: 20 miles there and 50 miles back for 70 miles total.
Steve drives 20 more miles. If you change the number of miles, you'll still get a 20-mile difference.


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