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a 是自然数,且17a=,求 a 的最小值. 这是第七届华杯赛的试题.问题不难,千万别把问题想得太难.17乘 a 是 n 个1组成的数,所以 n 个1组成的数除以17便是 a,当然这里的 n 要使商 a 为整数.因为 n 越小,商 a 也越小,所以做竖式除法直除到,n个1能被17整除,这时的 a 就是所求的
a is a natural number, and 17a=, find the minimum value of a. This is the question of the 7th China Cup. The problem is not difficult, don’t think too much about the problem. 17 times a is a number consisting of n 1, so The number of n 1s divided by 17 is a, of course, where n is to make the quotient a an integer. Because the smaller n is, the smaller the quotient is, so do vertical division to divide, and n 1 can be 17 Divisible, this time a is what you asked for