HUSSEIN AHMED AYED RABABA. Modify The Number Whose Unit Place Is Zero To Be Divisible By 11, And Divisible By 9. The American Journal of Applied Sciences, [S. l.], v. 3, n. 11, p. 48–53, 2021. DOI: 10.37547/tajas/Volume03Issue11-09. Disponível em: https://www.theamericanjournals.com/index.php/tajas/article/view/2174. Acesso em: 20 feb. 2026.