To know whether an egg is raw or boiled, simply spin the egg on its side, put a finger on top of it gently to stop it, then let the finger go.
A raw egg continues to spin because of the inertia of the liquid yolk still spinning within the shell.
![](https://i0.wp.com/66.media.tumblr.com/d6bdbdbab0ff1271c4ed245f38a86baa/tumblr_inline_pb6ptaDNrR1qef80s_540.png?w=840&ssl=1)
To know whether an egg is raw or boiled, simply spin the egg on its side, put a finger on top of it gently to stop it, then let the finger go.
A raw egg continues to spin because of the inertia of the liquid yolk still spinning within the shell.