How can you assemble six 1 × 2 × 2 blocks and three 1 × 1 × 1 blocks into a 3 × 3 × 3 cube?

Source: Two Dutch architects: Jan Slothouber and William Graatsma.

(In reply to kudos by Steven Lord)

I still recommend making a model.  The symmetry of the solution is hard to appreciate.

Posted by Jer on 2018-09-17 20:05:46