We know your level of the puzzle reassembling is God. You can take the pieces apart, don’t you? Now try to put the Cast Coil by Hanayama back together!
It seems impossible to remove the ring from this cube at first glance. Imagine the satisfaction when you actually do the impossible! Try Hanayama Cast Box Puzzle!
We are the kind of people who, when solving a math problem three times, get different answers each time. Nevertheless, we undoubtedly love the puzzles inspired by math!