tim hai so chan co tong la 140 va giua chung co 9 chan khac
tim hai so chan co tong la 842 giua chung co tat ca 13 so chan khac
Tim 2 so chan lien tiep co tong la 220, biet giua chung con ba so chan khac
Tim 2 so chan co tong bang 2006 va giua chung co 4 so le
Tim 2 so le co tong bang 2006 va giua chung co 4 so chan
tim 2 so tu nhien chan biet tong cua chung la 170 va giua 2 so chan do co 12 so chan
tim hai so tu nhien co tong la 2015 va giua chung co 8 so chan lien tiep.
tim 2 so chan co tong bang 2006 va giua chung co 4 so chan
tim hai so chan co tong la 2010 biet rang giua chung co 4 so chan
tong 2 so la 400 . tim so be ,biet giua chung co 13 so chan khac nhau.Tim so be?