2015 袋鼠数学 D-Cadet 真题 答案 详解

2015 年 D-Cadet 真题,中英双语,答案,详解

英文真题

KSf 2015 - selected problems Cadet

3 point problems

1. My umbrella has KANGAROO written on top, as shown in the picture on the right. One of the following pictures also shows my umbrella. Which one?
   (A)
   (B)
   (C)
   (D)
   (E)

2. Four identical small rectangles are put together to form a large rectangle as shown. The length of the shorter side of the large rectangle is 10 cm. What is the length of the longer side of the large rectangle?
   (A) 10 cm
   (B) 20 cm
   (C) 30 cm
   (D) 40 cm
   (E) 50 cm

3. Which of the following numbers is closest to 2.015 × 510.2 ?
   (A) 0.1
   (B) 1
   (C) 10
   (D) 100
   (E) 1000

4. The net of a cube with numbered faces is shown in the diagram.
   Sasha correctly adds the numbers on opposite faces of this cube. What three totals does Sasha get?
   (A) 4, 6, 11
   (B) 4, 5, 12
   (C) 5, 6, 10
   (D) 5, 7, 9
   (E) 5, 8, 8

5. Which of the following numbers is not an integer?
   (A) ( \frac{2011}{1} )
   (B) ( \frac{2012}{2} )
   (C) ( \frac{2013}{3} )
   (D) ( \frac{2014}{4} )
   (E) ( \frac{2015}{5} )