FIELD: visual aids. SUBSTANCE: invention is intended for use in combinatorics, algebra, programming. Ball for combinatorics has spherical support and surface shell divided into game elements mounted for movement on spherical support. Surface of shell is divided into meridian half-fractions with the aid of equatorial and several meridian planes. Spherical support is composed of two hemispheres. Outer surface of half-fractions is painted in the form of fragments of globe of the earth. EFFECT: instructiveness of demonstrations. 2 cl, 2 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| GLOBE | 1992 |
|
RU2028012C1 |
| BALL-GLOBE | 1992 |
|
RU2067487C1 |
| GAME/PUZZLE "SAIDOVЪS BALL" | 0 |
|
SU1391673A1 |
| VOLUME LOGIC BRAIN-TWISTER | 2006 |
|
RU2348445C2 |
| THREE-DIMENSIONAL COMBINATION PUZZLE | 2004 |
|
RU2253496C1 |
| PUZZLE-GAME SPHERE | 0 |
|
SU1755840A1 |
| THREE-DIMENSIONAL LOGICAL RIDDLE | 0 |
|
SU1321434A1 |
| PUZZLE WITH A MAGNETIC SYSTEM (OPTIONS) | 2022 |
|
RU2781298C1 |
| VOLUMETRIC LOGIC PUZZLE | 0 |
|
SU1532067A1 |
| VOLUMETRIC LOGIC PUZZLE | 0 |
|
SU1136820A1 |
