tim 2 so chan biet so be bang 5/9 so lon va giua chung co 8 so le
tim 2 so biet tong 2 so la 3983 biet giua chung co 23 so chan . tim so lon , so be
tim 2 so biet so lon gap doi so be va giua 2 so co 30 so chan . giai cho to nhe co ca loi giai luon
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 chan biet trung binh cong cua hai so do bang 184 va o giua chung co 3 so chan
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 hai so chan,biet o giua chung co 7 so chan.
tong hai so chan =2014. tim so lon biet giua hai so co 28 so chan khac.
cho 2 so chan co TBC bang 64va giua chung co 21 so chan tim so lon