MATH KANGAROO 2025 (CHINA)-LEVEL F 3 points 1.The year 2025 is a perfect square because 2025 =452.How many years will pass until the next year which is a perfect square 年份2025是一个完全平方数，因为2025=452。请问再过多少年才会出现下一个是完全平方数 的年份？ (A)25 (B)91 (C)121 (D)500 (E)2025 2.A student threw five stones.one after the other,which hit a window at the D/ points A.B.C.D and E.Where each stone hits the glass,it creates some linear cracks which stop either at a previous crack or at the boundary.In which order did he throw the stones B 一名学生依次扔出五块石头，分别击中了窗户上的点A、B、C、D和E。每块 E 石头击中玻璃时，都会产生一些线状裂纹，这些裂纹要么止于先前形成的一条裂纹 处，要么止于玻璃的边缘处。请问他是按照什么顺序扔出这些石头的？ (A)DACBE B)ABCDE (C)BDACE (D)BCDAE (E)DCABE 3.Vasily has 20 different coloured balls either yellow or green or blue or black.Of these,exactly 17 are not green,15 are not black,and 16 are not blue.How many balls are yellow Vasily有20个不同颜色的球，这些球的颜色分别为黄色、绿色、蓝色或黑色中的一种。其中，恰 好有17个球不是绿色的，15个球不是黑色的，16个球不是蓝色的。请问黄色的球有多少个？ (A)8 (B)7 (C)6 (D)4 (E)3 4.In what interval does the value of 88 x 888 lie 请问88×888的值位于哪一区间内？ (A)Between8and888和88之间 (B)Between88and88888和888之间 (C)Between888and8888888和8888之间 (D)Between8888and888888888和88888之间 (E)Between88888and88888888888和888888之间
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