1．One day the Beverage Barn sold 252 cans of soda to 100 customers,and every customer bought at least one can of soda.What is the maximum possible median number of cans of soda bought per customer on that day？（　?。?br />某天，Beverage Barn售出了252罐汽水給100名顧客，每位顧客至少買了一罐汽水。那天每位顧客購買的汽水數(shù)量的中位數(shù)最大可能是多少？（　?。?/div>

2．如圖A、B、C、D、E五個盤子里，分別放有若干塊糖，其中D盤里的糖果數(shù)量最多，如果取其中一個或相鄰的兩個盤子或相鄰的三個盤子或相鄰的四個盤子或五個盤子全取，共得到21種數(shù)量的糖塊，這21種數(shù)量恰好能表示1至21的所有數(shù)。那么，D盤子中有糖塊 個。

3．Paul owes Paula 35 cents and has a pocket full of 5-cent coins,10-cent coins,and 25-cent coins that he can use to pay her.What is the difference between the largest and the smallest number of coins he can use to pay her？（　　）
Paul欠Paula 35美分，他的口袋里裝滿了5美分、10美分和25美分的硬幣，他可以用這些硬幣來還她。他還她的硬幣數(shù)量的最大值和最小值之間的差異是多少？（　?。?/div>