A cube can see up to three faces.

Every face you see is1/kloc-0 /×11=121(cm2)), but the cubes represented by the intersections of two faces and three faces are duplicated. Take seeing the upper face and the left and right faces at the same time as an example.

Idea 1:

The first side:1/kloc-0 /×11=121-cm2,12/kloc.

Second surface:1/kloc-0 /×10 =10] cm2,110/= 65438.

The third side:10×10 =100 (cm2), 100 (1 = 100).

121+10+100 = 331(pieces)

Idea 2:

The first side:1/kloc-0 /×11=121-cm2,12/kloc.

Second surface:1/kloc-0 /×10 =10] cm2,110/= 65438.

The third surface:1/kloc-0 /×10 =10] cm2,110/= 65438.

For the second and third sides of 10㎝, recalculate 10 small cubes.

12 1+ 10+ 10- 10 = 33 1)

Idea 3:

Each side:1/kloc-0 /×11=121(cm2),12/kloc.

The intersection of every two faces is 1 1, and the total is 1 1× 3 = 33. However, the small cube where three faces intersect is only reduced three times, so 1 should be supplemented.

363-33+ 1 = 33 1 (pieces)