問題詳情
28. 圖 ( 十六 ) 為雅婷左手拿著 3 張深灰色與 2 張淺灰色的牌疊在一起的情形。以下是她每次洗牌的三個步驟：步驟一：用右手拿出疊在最下面的 2 張牌，如圖 ( 十七 )。步驟二：將右手拿的 2 張牌依序交錯插入左手拿的 3 張牌之間，如圖 ( 十八 )。步驟三：用左手拿著顏色順序已改變的 5 張牌，如圖 ( 十九 )。若依上述三個步驟洗牌，從圖 ( 十六 ) 的情形開始洗牌若干次後，其顏色順序會再次與圖 ( 十六 ) 相同，則洗牌次數可能為下列何者？
(A) 18
(B) 20
(C) 25
(D) 27
(A) 18
(B) 20
(C) 25
(D) 27
參考答案
無參考答案
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