Tim 2 so co tong la 2053,biet giua chung co 3 so chan nua
tim hai so chan co tong la 2010 biet rang giua chung co 4 so chan
Tim 2 so chan lien tiep co tong la 220, biet giua chung con ba so chan khac
tong cua 2 so le la 884. tim 2 so do , biet rang giua chung co 7 so chan lien ie nua
tim hai so tu nhien co tong la 2009/tim hai so do biet giua chung co 20 so chan
tim hai so chan co tong la 70, biet giua chung co 5 so le
tong cua hai so le bang 884 . tim hai so do , biet rang giua chung co 7 so chan liên tiep nua ?
hai so chan co tong la 30. tim hai so do biet giua chung co 3 so le lien tiep
tim hai so khi biet tong cua chung la 2008.giua chung co 10 so chan