2014 澳洲 AMC C-Junior 真题 答案 详解
2014-10-06 auamc auamc C-Junior
| 序号 | 文件列表 | 说明 | ||
|---|---|---|---|---|
| 1 | 2014-C-Junior-paper-eng-zh.pdf | 5 页 | 150.51KB | 中英双语真题 |
| 2 | 2014-C-Junior-paper-eng.pdf | 6 页 | 52.27KB | 英文真题 |
| 3 | 2014-C-Junior-key.pdf | 1 页 | 11.18KB | 真题答案 |
| 4 | 2014-C-Junior-solution-eng.pdf | 13 页 | 140.58KB | 真题文字详解(英文) |
中英双语真题
Primary Exam 1-10 questions, each worth 3 points
1. The expression (17 + 16 + 14 + 13) equals
(A) 60 (B) 61 (C) 63 (D) 68 (E) 70
-
In the diagram on the right, what is the value of (x)?
(A) 80 (B) 70 (C) 60 (D) 50 (E) 40 -
What is the perimeter of the figure below?
(A) 21 (B) 30 (C) 36 (D) 39 (E) 78 -
This week my cold drink stand sold $29 worth of lemonade but I spent $34 to buy lemons and $14 for sugar. How much did I lose this week?
(A) $1 (B) $9 (C) $19 (D) $21 (E) $29 -
The fraction (\frac{1}{0.04}) is equal to
(A) 15 (B) 20 (C) 25 (D) 40 (E) 60 -
If a number's (\frac{5}{6}) is 30, then its (\frac{3}{4}) is
(A) 22.5 (B) 24 (C) 25 (D) 27 (E) 40
英文真题
Junior Division
Questions 1 to 10, 3 marks each
-
What is the value of 17 + 16 + 14 + 13?
(A) 60
(B) 61
(C) 63
(D) 68
(E) 70 -
In the diagram the value of x is
(A) 80
(B) 70
(C) 60
(D) 50
(E) 40 -
What is the perimeter of the figure below in centimetres?
(A) 21
(B) 30
(C) 36
(D) 39
(E) 78 -
This week at my lemonade stand I sold $29 worth of lemonade, but I had spent $34 on lemons and $14 on sugar. My total loss for the week was
(A) $1
(B) $9
(C) $19
(D) $21
(E) $29 -
The value of (\frac{1}{0.04}) is
(A) 15
(B) 20
(C) 25
(D) 40
(E) 60 -
If (\frac{5}{6}) of a number is 30, what is (\frac{3}{4}) of the number?
(A) 22.5
(B) 24
(C) 25
(D) 27
(E) 40
真题文字详解(英文)
Junior Division
1. What is the value of 17 + 16 + 14 + 13?
(A) 60 (B) 61 (C) 63 (D) 68 (E) 70
▸ As 17 + 13 = 30 and 16 + 14 = 30, so 17 + 16 + 14 + 13 = 60, hence (A).
-
(Also I2) In the diagram the value of x is
(A) 80 (B) 70 (C) 60 (D) 50 (E) 40
▸ Alternative 1 The three interior angles of the triangle are (x^\circ), (50^\circ) and (60^\circ). These add to (180^\circ), so (x+110=180) and (x=70), hence (B).
Alternative 2 Using the exterior angle formula, (x+50=120), so that (x=70), hence (B). -
What is the perimeter of the figure below in centimetres?
The combined height of the two right-hand boundaries is 8 cm and the combined length of the two top boundaries is 10 cm. So the total perimeter is (2 \times 10 + 2 \times 8 = 36) cm, hence (C).
2014 AMC – Junior Division
