9 cards were numbered from 1-9. There were four people A,B,C and D. Each collected two cards.
A said, "The sum of the numbers on my cads is 6."
B said, "The difference between the numbers on my cards is 5."
C said, "The product of mine is 18."
D said, "The number on one of my cards is twice the other."
What is the number on the remaining card?
I want to ask............
2007-11-30 4:03 am
回答 (2)
2007-11-30 4:15 am
✔ 最佳答案
A said, "The sum of the numbers on my cads is 6."=>(1,5) or (2,4)
B said, "The difference between the numbers on my cards is 5."
=>(1,6) or (2,7) or (3,8) or (4,9)
C said, "The product of mine is 18."
=>(3,6) or (2,9)
D said, "The number on one of my cards is twice the other."
=>(1,2) or (2,4) or (3,6) or (4,8)
2007-11-29 20:16:21 補充：
soA get 1 and 5B get 2 and 7C get 3 and 6D get 4 and 8
2007-11-30 4:25 am
remaining card is 9.
A holds 1,5
B holds 2,7
C holds 3,6
D holds 4,8
A holds 1,5
B holds 2,7
C holds 3,6
D holds 4,8
參考: ME
收錄日期: 2021-04-13 15:16:42
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https://hk.answers.yahoo.com/question/index?qid=20071129000051KK02923