2020 袋鼠数学 E-Junior 真题 答案 详解
2020-04-01 mathkangaroo mathkangaroo E-Junior
| 序号 | 文件列表 | 说明 | ||
|---|---|---|---|---|
| 1 | 2020-E-Junior-paper-eng.pdf | 8 页 | 2.56MB | 英文真题 |
| 2 | 2020-E-Junior-paper-eng-zh.pdf | 10 页 | 471.63KB | 中英双语真题 |
| 3 | 2020-E-Junior-key.pdf | 1 页 | 275.17KB | 真题答案 |
英文真题
30th INTERNATIONAL KANGAROO MATHEMATICS CONTEST 2020
KSF - Problems Junior (Class 9 & 10)
Time Allowed: 180 minutes
SECTION ONE - (3 point problems)
- The diagram shows a shape made from ten squares of side length 1 cm joined edge to edge.
What is the length of its perimeter?
(A) 14 cm
(B) 18 cm
(C) 30 cm
(D) 32 cm
(E) 40 cm
-
When the answers to the following calculations are put in order from smallest to largest, which will be in the middle?
(A) 1 + 2345
(B) 12 + 345
(C) 123 + 45
(D) 1234 + 5
(E) 12345 -
Who is the mother of the daughter of Anne's mother's mother?
(A) Anne's sister
(B) Anne's niece
(C) Anne's mother
(D) Anne's aunt
(E) Anne's grandmother -
When Cosmo wears his new shirt properly as shown on the left, the horizontal stripes form seven closed rings around his waist. This morning he buttoned his shirt wrongly, as shown on the right. How many closed rings were there around Cosmo's waist this morning?
(A) 0
(B) 1
(C) 2
(D) 3
(E) 4
中英双语真题
Kangaroo Math Competition 2020 - Junior
3 points
1. This shape is made from ten squares of side length 1 cm. What is its perimeter?
下图是由十个边长为1 cm的正方形所组成的形状。请问该形状的周长是多少？
(A) 14 cm (B) 18 cm (C) 30 cm (D) 32 cm (E) 40 cm
2. When the following five sums are arranged in order from smallest to largest, which one will be in the middle?
计算以下几个选项的值，然后按从最小到最大顺序排列，请问哪一个会出现在中间？
(A) 1 + 2345 (B) 12 + 345 (C) 123 + 45 (D) 1234 + 5 (E) 12345
3. Who is the mother of the daughter of Anne's mother's mother?
请问Anne的妈妈的妈妈的女儿的妈妈是谁？
(A) Anne's sister Anne的姐姐 (B) Anne's niece Anne的侄女 (C) Anne's mother Anne的妈妈 (D) Anne's aunt Anne的阿姨 (E) Anne's grandmother Anne的外婆/姥姥
4. When Cosmo wears his new shirt properly as shown on the left, the horizontal stripes form seven closed rings around his waist. This morning he buttoned his shirt wrongly, as shown on the right. How many closed rings were there around Cosmo's waist this morning?
如下图所示，当Cosmo正确的扣上新衬衫的扣子时，衬衫的条纹在他的腰部形成了七个闭合的圈。而右图显示的是他今天早上不小心把扣子扣错了的状况。请问Cosmo今早的衬衫条纹在他腰间形成了多少个闭合的圈？
(A) 0 (B) 1 (C) 2 (D) 3 (E) 4
