When he brought this to Lowe’s attention Lowe hired a math professor, Carl Leffer, to help him increase the amount of Bingo combinations. By 1930 they had invented over 6,000 Bingo cards – reputedly at the cost of Leffer’s sanity.
Baada ya kuletwa hii kwa tahadhari ya Lowe Lowe wafanyakazi profesa math, Carl Leffer, kumsaidia kuongeza kiasi cha mchanganyiko Bingo. By 1930 walikuwa zaidi ya 6,000 kadi zuliwa Bingo – reputedly katika gharama ya sanity Leffer ya.