2009 澳洲 AMC B-UpperPrimary 真题 答案 详解

2009 年 B-UpperPrimary 真题,中英双语,答案,详解

中英双语真题

Elementary School High Grades (5-6th Grade) Test Paper
1-10 questions, 3 points each

1. For the number shown below, if you multiply the ten-thousands digit by 4 and divide the hundreds digit by 2, what is the new number?
   [ \boxed{24424} ]
   (A) 28824 (B) 44224 (C) 44824 (D) 14824 (E) 28224

2. If a number is multiplied by 7 and then increased by 7, the result is 33. What was the original number?
   (A) 8 (B) 13 (C) 16 (D) 24 (E) 26

3. Which option is closest to 1000 seconds?
   (A) 1 hour (B) 1 day (C) 45 minutes (D) 30 minutes (E) 15 minutes

4. The diagram shows an unfolded cube. On this cube, which face is opposite the face with the number 6?
   (A) 1 (B) 2 (C) 3 (D) 4 (E) 5

5. At 1:20, what is the angle between the hour hand and the minute hand on the clock?
   (A) 40 degrees (B) 45 degrees (C) 80 degrees (D) 100 degrees (E) 120 degrees

英文真题

Upper Primary Division Questions 1 to 10, 3 marks each 1. For the number below, what number will be obtained if I double the ten-thousands digit and halve the hundreds digit? 24424 (A) 28824 (B) 44224 (C) 44824 (D) 14824 (E) 28224 2. When Sam doubled a number and then added 7, it became 33. What was the original number? (A) 8 (B) 13 (C) 16 (D) 24 (E) 26 3. Which of the following is closest to 1000 seconds? (A) 1 hour (B) 1 day (C) 45 minutes (D) 30 minutes (E) 15 minutes 4. The net below is folded to form a cube. On this cube, what number is on the face opposite the number 6? (A) 1 (B) 2 (C) 3 (D) 4 (E) 5 5. What is the angle, in degrees, between the hands of a clock showing 1:20? (A) 40 (B) 45 (C) 80 (D) 100 (E) 120