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That depends on how big a Pyramid you want to build, what you are using to build it, and whether you have money and assistance. If you are building with Legos, and you have the space and the resources, then ... say an hour or so. If you are building a full-scale pyramid out of sand without millions of dollars worth of equipment and resources and with no one helping you... more than your lifespan.

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17y ago

What else can I help you with?