True Genius: Grecian Computer

True Genius puzzles are brainteaser puzzles with ancient civilization themes including China, Aztec, Rome, Greece and Egypt. The puzzles are finished in an antique style to look as though they might actually be artifacts from long ago.

The Grecian Computer is a high-difficulty math puzzle that challenges solvers to rotate the dials so that all of the columns coming out from the center add up to 42.