2021 袋鼠数学 D-Cadet 真题 答案 详解
2021-04-04 mathkangaroo mathkangaroo D-Cadet
| 序号 | 文件列表 | 说明 | ||
|---|---|---|---|---|
| 1 | 2021-D-Cadet-paper-eng.pdf | 8 页 | 969.05KB | 英文真题 |
| 2 | 2021-D-Cadet-key.pdf | 1 页 | 275.41KB | 真题答案 |
英文真题
31st INTERNATIONAL KANGAROO MATHEMATICS CONTEST 2021 KSF Problems Cadet (Class 7 & 8) Time Allowed: 180 minutes SECTION ONE - (9 point problems) 1. Which of the following symbols of signs of the Zodiac has an axis of symmetry? (A) Sagittarius (B) Scorpio (C) Leo (D) Cancer (E) Capricorn 2. The figure shows three concentric circles with four lines passing through their common centre. What percentage of the figure is shaded gray? (A) 30% (B) 35% (C) 40% (D) 45% 3. How many squares could be formed by connecting four of the 10 marked points of the grid in the picture? (A) 0 (B) 1 (C) 2 (D) 3 4. How many four-digit numbers have the property that their digits, from left to right, are consecutive and in ascending order? (A) 5 (B) 6 (C) 7 (D) 9
