提问GMAT余数题,实在数学差,希望指点!
If 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. 2 is not a factor of n.
2. 3 is not a factor of n.
请问这题思路是什么啊?怎么利用那两个条件,我完全无从下手
（n+1)(n-1)，中间是相乘，我多余打了个*
人气：298 ℃ 时间：2020-06-27 13:19:25
解答
Answer:According to the given condition,we have (n-1)(n+1)-r = 24m,where m is an integer,and therefore,r = n²-1-24m.1.Let m=0,n=3,we have r=8.Note that 2 is not a factor of n when n=3.2.Let m=0,n...
推荐
猜你喜欢
- 有一种24点游戏,其游戏规则是这样的：将4个负1至13之间(除去0)的整数进行加减乘除四则运算（每个数只能用一次）,使其结果为24,例如1、2、3、4可做如下运算：（1+2+3）*4=24
- 盒子里有5个红球,3个黄球,从中任意摸一个球,摸出红球的可能性是(),摸出黄球的可能性是().
- 选择正确的疑问词填空（四年级） what what's where which how whose who when what time
- We will take a ship at jiujiang in ( )northern Jiangxi and travel ( )west
- The teather told us to remain silent unless_____ .A.to be asked.B.being asked .C.asked.D,you
- 某市为更有效地利用水资源，制定了居民用水收费标准：如果一户每月用水量不超过15立方米，每立方米按1.8元收费；如果超过15立方米，超过部分按每立方米2.3元收费，其余仍按每立方米1.8
- 天空是五颜六色的吗
- 有A、B两个圆柱的容器,从里面量得A、B的底面半径分别是10cm和5cm,它们分别盛有4
