kxiaoli1092
幼苗
共回答了13个问题采纳率:84.6% 举报
第一个:(1) + (2) + (3) = (2) + (3) + (4) == (1) = (4)类似可以推导出(1) = (4) = (7) = (10) = 16(2) = (5) = (8) = A(3) = (6) = (9) = B总数100:16 * 4 + 3A + 3B = 100 ==?A + B = 12所以A(也就是第8个盘子里的数目)最大是11.第二个:设甲乙两人速度分别为a,b,两地距离为D,有:26a = 26b + D6(a + b) = D (1)下式代入上式,有:20a = 32b已知b = 50,所以a = 80.一起代入(1),得D = 780.
1年前
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