- Thread starter
- #1
Albert
Well-known member
- Jan 25, 2013
- 1,225
$\dfrac{\square}{\square \square}+\dfrac{\square}{\square \square} +\dfrac{\square}{\square\square}=1------(*)$
fill in the above 9 blanks with 1~9 without repetition and satisfy (*)
(you should find it using mathematical analysis,and show your logic,don't use any
program)
in fact there is only one possibility
fill in the above 9 blanks with 1~9 without repetition and satisfy (*)
(you should find it using mathematical analysis,and show your logic,don't use any
program)
in fact there is only one possibility