2003COMC加拿大數(shù)學(xué)公開(kāi)賽真題免費(fèi)下載

歷年 Canadian Open Mathematics Challenge加拿大數(shù)學(xué)公開(kāi)賽

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2003 COMC真題免費(fèi)下載

共計(jì)2.5小時(shí)考試時(shí)間

此套試卷由兩部分題目組成

Part A共8題，每題5分

Part B共4題，每題10分

共計(jì)12題，滿分80分

不可使用任何計(jì)算器

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部分真題預(yù)覽：

Part A :

1)Jeff, Gareth and Ina all share the same birthday. Gareth is one year older than Jeff, and Ina is two years older than Gareth. This year the sum of their ages is 118. How old is Gareth?

3)A circle of radius 1 is centred at the origin. Two particles start moving at the same time from the point (1 ,0) and move around the circle in opposite directions. One of the particles moves counterclockwise with constant speed v and the other moves clockwise with constant speed 3v. After leaving (1 ,0), the two particles meet first at point P, and continue until they meet next at point Q. Determine the coordinates of the point Q.

5)In the diagram, square ABCD has a side length of 6. Circular arcs of radius 6 are drawn with centres B and D. What is the area of the shaded region?

Part B :

2)A barn has a foundation in the shape of a trapezoid, with three sides of length 6 m, and one side of length 12 m, as shown.

1. Determine each of the interior angles in the trapezoid.
2. Chuck the Llama is attached by a chain to a point on the outside wall of the barn. Chuck is smarter than the average llama, and so realizes that he can always reach the area between the barn and where the chain is fully extended.
   • If Chuck is attached at the point A with a chain of length 8 m, what is the area outside the barn that Chuck can reach?
   • If Chuck is attached at some point P along the wall between A and B with a chain of length 15 m, determine the location of P which restricts Chuck to the minimum area.

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