Math CentralQuandaries & Queries


Question from Manpreet, a parent:

how many post do you need to make a pen with 40 post on each side

Mi Manpreet,

Suppose you had only 5 posts per side. Draw a diagram of a pen with 5 posts on each side. Count the number of posts. Can you now see the answer if you have 20 posts on each side?


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