| 摘要 |
PROBLEM TO BE SOLVED: To vary the probability that a prescribed mark appears on the front when a dice is thrown every mark and improve the interest of a game by differing the number of surfaces having the same mark displayed thereon every mark in a dice consisting of a polyhedron having marks displayed on respective surfaces. SOLUTION: In a dice 10 consisting of a regular hexahedron, a mark '1' is displayed on the front surface 11 thereof, a mark '2' on the right side surface 12 and flat surface 15 thereof, and a mark '3' on the back surface 13, left side surface 14 and bottom surface 16 thereof. Namely, this dice 10 has one surface showing '1', two surfaces showing '2', and three surfaces showing '3', so that the probability of '1' appearing on the front is 1/6, the probability of '2' appearing on the front is 1/3, and the probability of '3' appearing on the front is 1/2. Accordingly, the probability of a figure appearing on the front can be easily changed by changing the number of surfaces showing this figure, and in a card game using the dice 10, the progress of the game can be made interesting.
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