不玩四人行的潔牙竹籤 - 拼圖
By John
at 2007-12-17T01:19
at 2007-12-17T01:19
Table of Contents
(硬是要掰...)
┌─┬─┬─┬─┐
有40根牙籤排成如右圖的方格型 │ │ │ │ │
├─┼─┼─┼─┤
請問要拿掉多少根牙籤 才能確保不會有任何正方形形成 │ │ │ │ │
├─┼─┼─┼─┤
拿掉的牙籤數也是能越少越好 │ │ │ │ │
├─┼─┼─┼─┤
請注意 此圖含16個1x1 9個2x2 4個3x3 及 1個4x4 的正方形 │ │ │ │ │
└─┴─┴─┴─┘
如果上題覺得還不過癮
可以試著想想看 如果是個5x5的方格型呢 (共60根牙籤)
猜猜看吧~
--
┌─┬─┬─┬─┐
有40根牙籤排成如右圖的方格型 │ │ │ │ │
├─┼─┼─┼─┤
請問要拿掉多少根牙籤 才能確保不會有任何正方形形成 │ │ │ │ │
├─┼─┼─┼─┤
拿掉的牙籤數也是能越少越好 │ │ │ │ │
├─┼─┼─┼─┤
請注意 此圖含16個1x1 9個2x2 4個3x3 及 1個4x4 的正方形 │ │ │ │ │
└─┴─┴─┴─┘
如果上題覺得還不過癮
可以試著想想看 如果是個5x5的方格型呢 (共60根牙籤)
猜猜看吧~
--
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拼圖
All Comments
By Todd Johnson
at 2007-12-21T07:01
at 2007-12-21T07:01
By Connor
at 2007-12-25T09:53
at 2007-12-25T09:53
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at 2007-12-29T07:52
at 2007-12-29T07:52
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at 2008-01-09T23:10
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at 2008-01-13T03:35
at 2008-01-13T03:35
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at 2008-01-15T05:46
at 2008-01-15T05:46
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