| 摘要 |
A calculator to aid in selecting bingo cards to increase the odds of winning. A fixed frame member has a slide member freely movable relative to it. The front face of the frame has a transverse slot and an indicator. Adjacent the slot, along its length, is an indicia scale made up of the letters BINGO. The slide member has a pluraity of transverse scales, each corresponding to a particular form of bingo game. The scales each have a corresponding indicia, identifying the particular game, which is spaced a distance substantially equal to the distance from the slot to the indicator plus the width of a scale. When an indicia is aligned with the indicator, its corresponding scale is visible in the slot and aligns with the letters BINGO. The numbers of the scale tell which numerals should be chosen under each letter to increase the chances of winning.
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