有没有好办法？

来源: cma 于 2009-12-30 08:21:09 [] [旧帖] [给我悄悄话] 阅读数 : (235 bytes)

The sum of the number in each line, column and diagonal in the 3x3 "magic
square" bellow is always constant. Only two numbers are visible.
Which number is missing in field a?

a x x
x x 47
x 63 x

Thanks!

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• 回复：有没有好办法？ -duo_duo- ♀ 给 duo_duo 发送悄悄话 (2 bytes) () 12/30/2009 postreply 11:52:24

• 回复：回复：有没有好办法？ -jinjing- ♀ 给 jinjing 发送悄悄话 (38 bytes) () 12/30/2009 postreply 13:16:06

• Yes. Do you have a fast and easy way to explain it? -cma- ♂ 给 cma 发送悄悄话 (66 bytes) () 12/30/2009 postreply 16:04:31

• 回复：Yes. Do you have a fast and easy way to explain it? -innercool- ♀ 给 innercool 发送悄悄话 innercool 的博客首页 (259 bytes) () 12/30/2009 postreply 18:31:12

• 回复：Yes. Do you have a fast and easy way to explain it? -jinjing- ♀ 给 jinjing 发送悄悄话 (344 bytes) () 12/30/2009 postreply 18:42:54

• 回复：有没有好办法？ -cma- ♂ 给 cma 发送悄悄话 (9 bytes) () 12/30/2009 postreply 20:38:40

• 多谢指教. -cma- ♂ 给 cma 发送悄悄话 (0 bytes) () 12/30/2009 postreply 20:39:40

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