Interactive: Will have to you purchase the larger pizza?

You could have the selection between the 8 inch pizza, the 14-inch and the 18-inch. Which is the most efficient purchase? Oh, and in finding out under how your elegance may win a pizza birthday party…

A little bit little bit of math may let you make higher selections relating to purchasing pizza.


At some point closing 12 months, an engineer and I went to a pizza position for lunch. The engineer instructed me he wasn’t very hungry, however he mentioned he was once going to get the 12-inch medium as a substitute of the 8-inch small — for the reason that medium was once greater than two times as large because the small, and it price just a little bit extra. This kind of blew my thoughts.

Why? Have in mind find out how to in finding the world of a circle? I dusted the cobwebs off of my geometry guide and located Space = Pi*(radius)^2

Click on to head without delay to the simulation which presentations the how the fee consistent with sq. inch varies in response to the pizza dimension. The researcher gathered 74,476 costs from 3,678 pizza puts across the nation (that is numerous knowledge) to create this chart. 


  1. What occurs to the fee consistent with sq. inch of pizza as you building up the diameter of the pizza?  
  2. According to this chart, will have to you ever purchase the 8-inch pizza? Why or why now not? 
  3. If given a decision between a 16 inch pizza and a 24 inch pizza, which might you select? Provide an explanation for the use of the information from the simulation. 

Excellent reminder from an educator who wrote in after this submit first seemed. Karin Kiewra: “Purchase the bigger pizza, however provided that you’ll be able to take house leftovers….”


We have now quite a bit extra of those interactive sources in our Interactive Library. Every include a worksheet too! 


 Questioning in regards to the pizza birthday party, take part within the FinCap Friday Frenzy for a possibility not to simplest get a pizza birthday party but in addition a digital talk over with from Yanely and sophistication set of her new guide. Spherical 2 of the competition begins….these days. Main points. 

the Writer

Tim Ranzetta

Tim’s saving behavior began at seven when a neighbor with a damaged hip gave him a canine strolling process. Her restoration, which took nearly a 12 months, ended in Tim getting to grasp the financial institution tellers moderately smartly (and amassing a financial savings account stability of over $300!). His fresh entrepreneurial adventures have integrated using a shredding truck, inspecting govt reimbursement programs for Fortune 500 firms and serving to households make higher school financing selections. After volunteering in 2010 to create and educate a non-public finance program at Eastside Faculty Prep in East Palo Alto, Tim noticed firsthand the have an effect on of a fascinating and activity-based curriculum, which impressed him to begin a brand new non-profit, Subsequent Gen Non-public Finance.


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