Evaluate Hot Pizza

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One day you step into a pizza shop. A small 6‐inch pizza costs 5 dollars. A large 12‐inch pizza costs 15 dollars. Both pizzas appear to be the same thickness. Which one will you buy?

Contributed by: Frederick Wu (December 2008)
Open content licensed under CC BY-NC-SA



Snapshot 1: buying the big pizza is more economical than buying the small pizza

Snapshot 2: buying the small pizza is more economical than buying the big pizza

Snapshot 3: buying the small pizza is almost the same as buying the big pizza

This Demonstration is similar to the question posed in "Buying Watermelons Intelligently"; it is another example of quick calculations in everyday life.

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