Mugore 1820, godobori remasvomhu John Leslie akadhindisa bhuku rainzi The Philosophy of Arithimetic iro raiva nebamhamberengi ya 99 kusvika pana 99 x 99. John Leslie aikurudzira vadzidzi vake kuti vazive Tafura yeKuwanza Huwandu nemusoro kusvika pana 25 x 25.