2009-03-15 19:51:45拜足

數字 撲朔迷您 5

_1_2_3_4_5_6_7_8_ 9 = 100

空格中填入 +, - , x

求解

(*數字5 撲朔解http://mypaper.pchome.com.tw/littleflea/post/1312352266)

 

(**數字4 撲朔解

6729 / 13458 = 9327 / 18654

(there are 10 other possibilities to write similar fractions by using all digits from 1 to 9 once)   

** http://mathworld.wolfram.com/PandigitalFraction.html )