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When you can spin it like a top on one end. An uncooked egg will not continue to spin due to the liquid in it. A hard boiled egg WILL continue to spin due to more of a solid internal mass.

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Wiki User

15y ago
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14y ago

Atleast 30 minutes; But be sure to check on them!

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Wiki User

13y ago

I would say a solid 3 minutes

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Q: When is an egg hard boiled?
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