贡献今天考试中的一道数学题 x is positive integer, is (x-1)(x+1) divisible by 24? (1) x is not divisible by 3 (2)x-1 is divisible by 2 这道题我在考试之前貌似没有在4月至5月的新题库中看到,所以就拿出来了,如果是重复的请见谅~~ 别的想到了再拿上来~~~
谢谢lz,这是狗狗的一个变体吧, 257If n is a positive integer and r is the remainder when (n-1)(n+1) is divided by 24, what is the value of r? 1). n is not divisible by 2 2). n is not divisible by 3 原题选c
谢谢lz,这是狗狗的一个变体吧, 257If n is a positive integer and r is the remainder when (n-1)(n+1) is divided by 24, what is the value of r? 1). n is not divisible by 2 2). n is not divisible by 3 原题选c