2014 澳洲 AMC B-UpperPrimary 真题 答案 详解

2014 年 B-UpperPrimary 真题,中英双语,答案,详解

中英双语真题

Elementary School Grade 5 Test 1-10 questions, 3 points each
1. The sum of 7 + 6 + 4 + 3 equals
(A) 20 (B) 19 (C) 18 (D) 17 (E) 16

1. Which figure can be folded along the dotted lines to form a right circular cone?
   (A) (B) (C) (D) (E)

2. Fold a square piece of paper according to the diagram to form a triangle, then fold again to form a smaller triangle, and finally fold once more to form an even smaller triangle. How many layers does the smallest triangle have?
   (A) 3 (B) 4 (C) 6 (D) 8 (E) 12

英文真题

Upper Primary Division Questions 1 to 10, 3 marks each 1. What is the value of 7 + 6 + 4 + 3? (A) 20 (B) 19 (C) 18 (D) 17 (E) 16 2. Which shape can make a pyramid if you fold along the dotted lines? (A) (B) (C) (D) (E) 3. A square of paper is folded in half to make a triangle, then in half to make a smaller triangle, then in half again to make an even smaller triangle. How many layers of paper are in the final triangle? (A) 3 (B) 4 (C) 6 (D) 8 (E) 12

真题文字详解(英文)

Upper Primary Division 1. What is the value of (7 + 6 + 4 + 3) ?
(A) 20 (B) 19 (C) 18 (D) 17 (E) 16
(7+3=10 \text{ and } 6+4=10 \text{ so } 7+6+4+3=20), hence (A).

1. (Also MP8) Which shape can make a pyramid if you fold along the dotted lines?
   Since each of (A)-(E) have a square, the only possible pyramid is a square-based pyramid, which has one square face and 4 triangular faces, hence (A).

2. (Also MP14) A square of paper is folded in half to make a triangle, then in half to make a smaller triangle, then in half again to make an even smaller triangle. How many layers of paper are in the final triangle?
   Each folding doubles the number of layers:
   hence (D).

2014 AMC - Upper Primary Division