2012 澳洲 AMC B-UpperPrimary 真题 答案 详解

中英双语真题

小學高年級(5-6 年級)卷 1-10 题，每题3分 1. 算式101-2+1+102等於 (A)0 (B)100 (C)198 (D)200 (E)202 2. 小馬足球隊在某場比賽贏對手二球，而在此場比賽中兩隊共踢進8球。請問 小馬足球隊在此場比賽共踢進幾球？ (A)3 (B)4 (C)5 (D)6 (E)8 3. 請問以下哪一項的輪轉到兔子的機會較大？ (A) (B) (C) (D) (E) 4. 一小罐的檸檬汁容量為250 ml。請問需要用多少罐這樣的檸檬汁才能注滿一 個容量為2.5 L的水壺？ (A)3 (B)4 (C)6 (D)8 (E)10 5. 下列哪一項的值介於(\frac{1}{5})與(\frac{1}{4})之間？ (A)0.26 (B)0.15 (C)0.21 (D)0.19 (E)0.3

英文真题

Upper Primary Division Questions 1 to 10, 3 marks each 1. What is the value of 101 - 2 + 1 + 102? (A) 0 (B) 100 (C) 198 (D) 200 (E) 202 2. Mary's soccer team wins a game by two goals. Between them the two teams scored 8 goals. How many goals did Mary's team score? (A) 3 (B) 4 (C) 5 (D) 6 (E) 8 3. Which of these spinners would be more likely to spin a rabbit? (A) (B) (C) (D) (E) 4. A small can of lemonade holds 250 mL. How many of these cans would fill a 1.5 L jug? (A) 3 (B) 4 (C) 6 (D) 8 (E) 10 5. Which of the following numbers has a value between (\frac{1}{5}) and (\frac{1}{4})? (A) 0.26 (B) 0.15 (C) 0.21 (D) 0.19 (E) 0.3

真题文字详解(英文)

Upper Primary Division - Solutions
1. 101 - 2 + 1 + 102 = 202, hence (E).
2. (Also MP5) We look for two numbers, 2 apart which add to 8. These are 5 and 3, so Mary's team scored 5 goals, hence (C).
3. (Also MP6) The chance of a rabbit with spinner A is ( \frac{3}{8} ); with spinner B is ( \frac{2}{4} );
(A)
(B)
(C)
(D)
(E)
with spinner C is ( \frac{1}{4} ); with spinner D is ( \frac{2}{6} ); and with spinner E is ( \frac{1}{3} ). The largest of these is ( \frac{2}{4} ), hence (B).
4. As 1.5 L = 1500 mL, we have 1500 ÷ 250 = 6, and so 6 of these cans would be needed, hence (C).
5. The fractions ( \frac{1}{5} = 0.2 ) and ( \frac{1}{4} = 0.25 ) and the only number given which is between them is 0.21, hence (C).
6. The minute hand turns through 360° in an hour. From 2 pm to 4 pm is 2 hours, so the minute hand will rotate 2 × 360° = 720°, hence (E).
7. (Also MP9) Suppose Mary colours the hexagon shown red (R). Then the six hexagons sharing an edge with this one must be a different colour. She then colours the one shown green (G). Then there is the next hexagon which touches both the red and green