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By on April 1, 2006, with 25 Comments

Allright, not an illusion but either way try to solve this puzzle. Don’t expect any tips from me! Following cube is composed of two parts. If you take the upper part, obviously you will pick up the whole cube, yet the cube can easily be decomposed without breaking it. The answer is simple, just think for a second – [via].

This is the solution as you probably assumed:

  • abhijit

    The top slides out.

    The wedges on all the four sides don’t connect in a cross inside. That is, they’re not connected to the wedges on the opposite sides. Instead, two of the wedges connect to the two on either side of them.

    In the picture, the wedge on the right connects to the unseen wedge on the right at the back. And the wedge on the left connects to the unseen wedge on the left at the back of the block.

    The lid would have similar grooves.

  • Greg Miller

    I’d be tempted to say that one of the dovetails isn’t real (e.g. painted on) so the blocks can move freely.

    It’s also possible that the two dovetails we see are connected to eachother, and there aren’t dovetails on the other two sides.

  • mshield

    the grooves are actually parallel to each other and at a 45 degree angle from the cube faces. This way the top half of the cube can be pushed straight backwards relative to the orientation of the cube in the picture, along a line connecting the front corner and the back corner.

  • intelligence

    wow this is one of the worst “illusions” i have ever seen.

  • rabbit

    Well, interesting idea, but if abhijit is right, then it is not an illusion – just a trick (however, i’m not gonna use the websters on this :) Nice idea, anyway

  • adam

    ‘intelligence’, it’s a trick on the mental model that humans create when they see something and attempt to evaluate it. Because we see two flat faces each with a jig-saw piece-style groove on it, we assume we understand (or rather we attempt to complete what we can’t see) the innards of the shape to be a cross piece locking the two together.

  • Anorion

    What if the bottom is made out of soft sponge?

  • Justin

    what if the dovetail is circular? derrrrrrr!

  • Anorion

    So what’s the answer? Isn’t it possible that the top swings out along a semicircular dovetail-rail?

  • Mike

    This is real, dovetails on all 4 sides. The reason it works is that the skewed crossection of a small dovetail is a bigger dovetail. So it looks normal on the flat plane of the surface when assembled. By comparison a circle would look like an oval when sliced in the same manner.

  • Eptin

    I was tempted to rotate the pieces. Without knowing what’s on the other side, it could have easily twisted apart.

  • swwser

    It is one piece of wood! It never came apart.

  • M 2 the H O

    the bottom half is cut diagnolly so that u can slide both sides of the bottom out.
    im not very good at explaning, so dont worry if u dont understand me ;P

  • rae

    oh i love dovetail puzzles!

    those ones are super simple….i have a few that i’ve never managed to open, but i do know that soem of them have magnets that you have to disconnect in just the right way….

    maybe i’ll send you pictures!

  • Lay-Lay

    I get it though

  • meeow =^_^=

    good trick to the eyes

  • gasman

    another way could be if the two wedges were either end of an arc, then you would simply have to swivel the top off

  • Anonymous

    it slides out diagnolly took me 2 seconds to figure out

  • Anonymous

    Why debate the solution is there, it slides as the pic says.

  • ANON

    I am 12 and I know it!

  • Hot chick

    first comment guy
    ya u sound like a really smart person just so u know

  • http://www.facebook.com/people/Khamani-Moore/1263064119 Khamani Moore

    i’m 16 & don’t understand the puzzle at all… huh?

  • Realist

    I believe that the word is decomposed not taken apart, therefore it is easy to just let it rot…

    • Realist

      Its a mind trick… not a physical one. Unless the word was misused.

  • Akire

    It slides forward and backwards that’s all:)