求助输血狗～有三个数字70， 200， n，……

happysmiledy · 发表于 2010-10-23 00:12:54

题目：有三个数字70， 200， n，他们任意一个都可以整除divide另外两个数字的乘积。问N的最大可能值和最小可能值之比。
答案：综合一下，最小值的可能是140，最大值的可能是14000。所以比值就是14000/140=100

没看懂……题目不是说任意一个都可以divide另两个数字的乘积吗，
如果n=140的话，200能整除（70×140）？？？我是不是理解错了……

water_st · 发表于 2010-10-23 00:14:21

是后面的那个除以200 你是理解错了
我认为呵呵不然这题没法做

fujianaicd · 发表于 2010-10-23 00:16:45

除，除以~~~英文应该不会混淆吧~~~divide，divided by

zhlee · 发表于 2010-10-23 00:23:06

n最小是140，最大是14000

zhipei · 发表于 2010-10-23 03:46:53

除，除以~~~英文应该不会混淆吧~~~divide，divided by

-- by 会员 fujianaicd (2010/10/23 0:16:45)

也在想这个题，同不明白
a divide b=a/b
a divided by b=b/a
我这样的理解应该对吧？

此题题目是说“70， 200， n，他们任意一个都可以整除divide另外两个数字的乘积”就应该是 a/(b*c)这种形式啊，怎么会颠倒过来的？？？

chinamerica · 发表于 2010-10-23 04:19:33

”任意一个都可以divide另两个数字的乘积“ 表达是对的～

Note that
A divides B ＝A is divisible by B = B is a divisor (factor) of A = A is a multiple of B
e.g.
5 divides 20 ＝20 is divisible by 5 = 5 is a divisor(factor) of 20 == 20 is a multiple of 5

Here any number divides the product of the other two, which means any number is a factor of the product of the other two.

zhipei · 发表于 2010-10-23 04:53:53

”任意一个都可以divide另两个数字的乘积“ 表达是对的～

Note that
A divides B ＝A is divisible by B = B is a divisor (factor) of A = A is a multiple of B
e.g.
5 divides 20 ＝20 is divisible by 5 = 5 is a divisor(factor) of 20 == 20 is a multiple of 5

Here any number divides the product of the other two, which means any number is a factor of the product of the other two.

-- by 会员 chinamerica (2010/10/23 4:19:33)

Thanks! Got it.

guoqiongjiu · 发表于 2010-10-23 05:35:41

”任意一个都可以divide另两个数字的乘积“ 表达是对的～

Note that
A divides B ＝A is divisible by B = B is a divisor (factor) of A = A is a multiple of B
e.g.
5 divides 20 ＝20 is divisible by 5 = 5 is a divisor(factor) of 20 == 20 is a multiple of 5

Here any number divides the product of the other two, which means any number is a factor of the product of the other two.

-- by 会员 chinamerica (2010/10/23 4:19:33)

BIG CROSS....A divides B= B is divisible by A=A is a divisor (factor) of B = B is multiple of A

chinamerica · 发表于 2010-10-23 05:53:34

sorry, the first term should be B divides A ..
In the example A=20, B=5
B divides A ＝A is divisible by B = B is a divisor (factor) of A = A is a multiple of B
5 divides 20 ＝20 is divisible by 5 = 5 is a divisor(factor) of 20 == 20 is a multiple of 5

ldu09 · 发表于 2010-10-23 06:42:16

(200＊N)/70
(70*N)/200
(200*70)/N
通過上面的式子可以求出Nmin＝140
通过最后一个式子可以求出Nmax＝14000
所以比例是1／100

求助输血狗～有三个数字70， 200， n，……

所属分类: GMAT考试

正在浏览此版块的会员 ()

浏览过的版块