2008 袋鼠数学 E-Junior 真题 答案 详解

英文真题

International Kangaroo Mathematics Contest 2008 Junior Level: Class (9 & 10) Max Time: 2 Hours 3-point problems 1) There are 5 boxes and each box contains some cards labelled A, E, I, O, U as shown. Aslam wants to remove cards from each box in such a way that at the end each box contains only one card, and different boxes contain cards with different letters. What card remains in box 2? 1 2 3 4 5 A) A B) E C) I D) O E) U 2) Amir and Ahmad did compete in running on 200 meters. Ahmad did it under half of the minute, but Amir did it under the hundredth part of one hour. Who and by how many seconds was faster? A) Ahmad by 36 seconds B) Amir by 24 seconds C) Ahmad by 6 seconds D) Amir by 4 seconds E) They did it by equal time 3) To greet the New Year day 2008, Akram put on a T-shirt with 2008 printed on it, and stood in front of a mirror on his hands, with his feet up. What was seen in the mirror by his friend Zahid, who stood (on this feet) beside Akram? A) 2008 B) 5008 C) 8002 D) 8005 E) 2005 4) a = 2 - (-4), b = (-2)(-3), c = 2 - 8, d = 0 - (-6) and e = (-12) ÷ (-2) How many of these results are not equal to 6? A) 0 B) 1 C) 2 D) 4 E) 5