2009 袋鼠数学 B-Ecolier 真题 答案 详解

2009 年 B-Ecolier 真题,中英双语,答案,详解

英文真题

International Kangaroo Mathematics Contest 2009 - Ecolier
Ecolier Level: class (3 & 4) Max Time: 2 Hours
3-Point Problems

1. $200 \times 9 + 200 + 9 =$ (A) 1909 (B) 2009

2. Where is the smiley? (A) In the circle and in the triangle, but not in the square. (B) In the circle and in the square, but not in the triangle.

3. Four sticks have 8 ends. How many ends do six and a half sticks have? (A) 14 (B) 13

4. On the display there is a number 930 (see the picture). How many little square lights must be switched on/off in order to obtain number 806? (A) 5 (B) 6

5. Mom has bought 16 apples. Mariam ate half of them, Nazish ate two and Salma ate the rest. How many apples did Salma eat? (A) 4 (B) 6

6. Hina threw a dice four times and she obtained a total of 23 spots. How many times did she get 6 spots? (A) 3 (B) 4

7. A movie is 90 minutes long. It started at 17:10. In the middle there were two commercial breaks, one lasting eight minutes and one lasting five minutes. At what time did the movie finish? (A) At 18:47 (B) At 18:53