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我想知道:
A,B,C同D係咩數
只要放到個數入去計得岩就ok了
冇任何限制既
ｔｈｘ
簡單MATHS
2009-10-14 4:40 am
回答 (4)
2009-10-14 9:14 am
✔ 最佳答案
the operation can be rewrite as the following format :(1000A+100B+10C+D)+(1000A+100D+10B+C)=(1000D+100C+10B+A)
=>2000A+110B+11C+101D=1000D+100C+10B+A
=>1999A+100B-89C-899D=0
By subing different combination of prime number from 0 to 9 , we hv
A = 1, B = 6, C = 9, D = 2
2009-10-15 4:31 am
a=2
d=3
c=9
b=6
d=3
c=9
b=6
2009-10-14 7:01 am
(3) B+D+1=9
2009-10-14 5:04 am
(1) D+C=10+A
(2) C+B=B ...... therefore, C=9
(3) B+D=9
(4) A+A=D
Form (1) D+9=10+A ...... therefore, D =1+A
Solve (1) and (4) ...... A=1
Answer: A = 1, B = 6, C = 9, D = 2
(2) C+B=B ...... therefore, C=9
(3) B+D=9
(4) A+A=D
Form (1) D+9=10+A ...... therefore, D =1+A
Solve (1) and (4) ...... A=1
Answer: A = 1, B = 6, C = 9, D = 2
收錄日期: 2021-04-21 22:03:19
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20091013000051KK01409