GeekDad Puzzle of the Week Solution: Lego my Ego!

Geek Culture

Again there were spectacular entries to this week’s puzzle and again my Geek Dad heart is warmed to its frostbitten cockles by the variety of answers I never would’ve predicted. It seemed like puzzlers either got this immediately or struggled mightily. And many, many of you referred to your kids — and not the geek adults! — coming up with the answer. That may be because it required out-of-the-box thinking. (Sorry…I designed this puzzle as much for the pun as for the challenge itself.)

Here’s the original:

With the following standard Lego pieces, how can you form a regular hexahedron, aka a cube?

12 of the following: brick 2×4′s

8 of the following: brick 2×3′s

8 of the following: brick 2×2′s

The correct answer must use all the pieces and, like a good cube, the answer must have six, defined, planar faces all of equal dimensions.

The trick was that a 2×2 Lego is not 2x2x2. You know those little square-top pieces we’ve been calling “cubes” all these years? Well, not so much. And so the most technically correct answer, as many of you found, was to build a 6x6x5 “cube” with a little hole in its center. Kudos to all who found this cool, non-intuitive solution. And kudos bordering on mad props to the burgeoning geek who submitted the following, which I also accepted:

Truly out of the box


But the winner of this week’s $50.00 ThinkGeek gift certificate is Jim, or more technically his 11-yo son, Jared! For those of you who didn’t win use this code GEEKDAD72JL and get $10.00 of your next order of $50.00 or more at ThinkGeek. Thanks for reading GeekDad and tune in Monday for another piece of cerebral performance art from Dave G.

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