Use U's

Use U's Pieces How to make
Prepare 60 cubes. At first, make 10 "U"-shaped piece ( 5 cubes each ). Then, stick one more cube on each "U" piece as diagramed. You'd better grind the gap of each "U" slightly wider than cube size to handle easier.

Problem
1. Put 10 pieces togather into 5x4x3 rectangular block.
2. Put 10 pieces togather into 6x5x2 rectangular block

Comments
This is my most favorite packing puzzle. Very hard one. If you solve this without computor, you can proud of yourself :-)

Exibited at "Hikimi Wooden Puzzle Competition 1994"

Copyright 1994 Yoshiya Shindo
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