數學難題,幫下我.....(急)

1. A=5 B=6 C=9 D=4 E=2 F=8

2008-09-06 10:35:58 補充：
第二題是否有負數呢或是掛錯位呢?

1.
a5
b6
c9
d4
e2
f3

569285296
+ 665282594
___________
1234567890

2008-09-05 14:01:26 補充：
f8

1.
A=5
B=6
C=9
D=4
E=2
F=8

2008-09-05 13:57:18 補充：
from left to right, the 3rd and 4th column
E+A=8
A+E=7
therefore C+C 必有進位, 所以C+C+1 = 19, therefore C=9

2008-09-05 13:57:34 補充：
from 5th and 6th column
F+F=6 or 16, E+E=5 or 15, therefore F+F=16 , i.e. F=8
if E=7, A+E=7 is impossible, therefore E=2
also A=5

2008-09-05 13:57:46 補充：
B+B = 3 or 13, since A=5 B must be 6 or above to get A+B =11 or 12
therefore B=6
and D=4

2008-09-05 15:03:07 補充：
乜樓下運用得咁快?

2008-09-07 13:58:34 補充：
第二題出錯!?
第一題已經解題啦! 唔明白?