A logical puzzle.
Choose the size of a black box and the number of Grnibbs you want to hide in it.
The app places the Grnibbs in the box.
Information you get when shooting light rays into the black box is needed to determine the position of the Grnibbs in the box.
https://andro.io/app/grnibbblackbox
Power 100
Android app profile
Grnibb Black Box for Android – Latest Version & Features
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> 2.2k
Monthly Downloads
~$900
Estimated Cost
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