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填 填 看 將1 ~ 9 填入右方九個圓圈中,使得每邊四個圓圈中之數字和皆為17
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Snake
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Nov 15, 2013, 8:16:23 PM
11/15/13
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填 填 看
將1 ~ 9 填入右方九個圓圈中,使得每邊四個圓圈中之數字和皆為17
,請問:
(1)共有幾組解?
(2)這些解中有何共同特徵?
(3)請說明為什麼?
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