Eureka!, Page 7

Cast O'Gear is one of the most interesting puzzles from Hanayama — a five-pointed star locked inside a ring. Separate and reassemble.

Hanayama Cast Dolce puzzle — separate the two pieces and return them to their original connected state.

Hanayama Cast Key 2 puzzle — separate the two keys and return them to their original interlinked state. Looks simple, but it's not!

Hanayama Cast S&S puzzle — remove the inner piece from the metal cube in this labyrinth-type puzzle. Find the path and work your way through.

Cast Donuts puzzle (2012) from the Hanayama luxury series. Separate the two donut-shaped rings and put them back together.

Cast BOX puzzle consists of a cube and a ring locked inside it. Your task is to remove the ring from the box and reassemble the puzzle.

A treble clef and an eighth note are entangled in this beautiful cast metal puzzle. The goal is to separate them and put them back together.

V-Cube 3x3x3 in black. Material: plastic. Difficulty: 3 out of 6. Challenge: scramble the colors and restore them to their original positions.

Hanayama Cast Delta is a beautiful symmetrical puzzle made of three parts. Delta truly stands out for its simple yet elegant appearance — and its surprisingly tricky solution.

Two sturdy G-shaped pieces of Hanayama Cast G&G appear at first glance to be loosely connected. Look closer — and you'll discover they are more thoroughly interlinked than you...

The challenge of Hanayama Cylinder is to separate it into five pieces. At first glance it seems simple — just unscrew it — but there is no external way to unscrew it!