2020 澳洲 AMC A-MiddlePrimary 真题 答案 详解

中英双语真题

1-10 Questions, 3 marks each
Questions 1 to 10, 3 marks each

1. 请问右图中总共有多少个正立方体？
   How many cubes are shown here?
   (A) 6 (B) 9 (C) 10 (D) 12 (E) 18

2. 20 + 20 =
   (A) 40 (B) 30 (C) 200 (D) 220 (E) 2020

3. 请问右图中时钟所显示的时刻是多少？
   What time is shown on this clock?
   (A) 3:05 (B) 3:50 (C) 5:03 (D) 5:15 (E) 5:30

4. 请问16的一半是多少？
   Half of 16 is
   (A) 32 (B) 4 (C) 9 (D) 7 (E) 8

5. 今天是星期四，请问后天是星期几？
   Today is Thursday. What is the day after tomorrow?
   (A) 星期四 (B) 星期五 (C) 星期六 (D) 星期日 (E) 昨天
   (A) Thursday (B) Friday (C) Saturday (D) Sunday (E) yesterday

英文真题

Middle Primary Division
Questions 1 to 10, 3 marks each

1. How many cubes are shown here?
   (A) 6 (B) 9 (C) 10 (D) 12 (E) 18

2. 20 + 20 =
   (A) 40 (B) 30 (C) 200 (D) 220 (E) 2020

3. What time is shown on this clock?
   (A) 3:05 (B) 3:50 (C) 5:03 (D) 5:15 (E) 5:30

4. Half of 16 is
   (A) 32 (B) 4 (C) 9 (D) 7 (E) 8

5. Today is Thursday. What is the day after tomorrow?
   (A) Thursday (B) Friday (C) Saturday (D) Sunday (E) yesterday

6. How many pieces have been placed in the jigsaw puzzle so far?
   (A) 25 (B) 27 (C) 30 (D) 33 (E) 35

真题文字详解(英文)

36 2020 AMC Middle Primary Solutions Middle Primary Solutions 1. 1 + 2 + 3 = 6 is half, so 6 + 6 = 12 is all, hence (D). 2. 20 + 20 = 40, hence (A). 3. The hour hand shows that the 5th hour has passed and the minute hand shows 15 minutes past the hour, hence (D). 4. 16 ÷ 2 = 8, hence (E). 5. Tomorrow is Friday and then the next day is Saturday, hence (C). 6. (Also UP1) Alternative 1 The completed puzzle will have 5 × 7 = 35 pieces, but 5 pieces have not been placed yet, so the number of correctly placed pieces is 35 - 5 = 30, hence (C). Alternative 2 There are 5 rows, each with 6 correctly placed pieces, giving a total of 5 × 6 = 30, hence (C). 7. (Also UP3, J3) The perimeter is the sum of the three sides: 11 + 7 + 16 = 34 metres, hence (B). 8. In the correct solution there will be an equal number of moves as moves and an equal number of moves as moves. Checking, (A) has four moves and no moves, so is not a solution. (B) has two each of , , and , so is a solution. (C) has three moves and one move, so is not a solution. (D) has two moves and four moves, so is not a solution. (E) has two moves and no moves, so is not a solution. Then only (B) is a solution, hence (B). www.amt.edu.au