论文部分内容阅读
【例题】在射箭运动中,每射一箭得到的环数或者是“0”(脱靶),或者是不超过10的自然数。甲、乙两名运动员各射了5箭,每人5箭得到的环数的积都是1764,但是甲的总环数比乙少4环。求甲、乙的总环数。答案:1.每射一箭的环数,只能是下列11个数中的一个:0、1、2、3、4、5、6、7、8、9、10。2.甲、乙5箭总环数数的积1764≠0,这说明在甲、乙5箭得到的环数里没有“0”和“10”。
[Examples] In archery, the number of rings for each arrow shot is either 0 (off target) or a natural number not exceeding 10. Two athletes, A and B, each fired 5 arrows. The number of rings obtained by 5 arrows per person is 1764, but the total number of rings in A is 4 rings less than B. Find the total number of rings for A and B. Answer: 1. The number of rings per arrow shot can only be one of the following 11 numbers: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10. 2. A, B The product of the total number of 5 arrows is 1764≠0, which means that there are no “0” and “10” in the rings obtained by the A and B arrows.