Arrange 3 Knives to Rest on Tips of Handles/Historical Note

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Historical Note on Arrange 3 Knives to Rest on Tips of Handles

This problem appears for the first time in Récréations Mathématiques of $1624$ by H. van Etten.

In its English translation, it is worded to arrange three knives so that they:

hang in the air without being supported by anything but themselves.


Sources