[原创] 截止10.3号 11道数学JJ题....一定要看

emma姐姐

唉呀，想不到太平洋MM动作哈快的说~~ 害我算半天，嘻嘻

mrjj

7、Is X>Y?

1). (X-Y)/X>0

2). (X^2-Y^2)/X^2>0

E
            

我选A，

8、A plane traveled k miles in the first 96 minutes of flight time. If it completed the remaining 300 miles of the trip in t minutes, what was its average speed, in mils per hour, for the entire trip?

（300+K）/（96+t）
            

 还要除以60分吧

 还要除以60分吧

9、Is the positive integer x an even number?

1). If x is divided by 3, the remainder is 2

2). If x is divided by 5, the remainder is 5

E
                

2). If x is divided by 5, the remainder is 5 这个怎么理解？

13、If m and n are positive integers, is m/n a terminal decimal?

1). 90<m<100

2). n=4

B
                                        

 terminal decimal是什么意思啊？

谢谢

 terminal decimal是什么意思啊？

谢谢

2). If x is divided by 5, the remainder is 5 这个怎么理解？

13、If m and n are positive integers, is m/n a terminal decimal?

1). 90<m<100

2). n=4

B
                            

 terminal decimal是什么意思啊？

谢谢

 terminal decimal是什么意思啊？

谢谢

jangx

这些题有的看起来好像做过，似乎是GWD里或者OG里的，不确定。比如5，6，8，10

记得5的条件是：

1). X divided by 100 has a remainder of 30

2). X divided by 110 has a remainder of 30

lz确定是jj吗？

 

晶莹

以下是引用mrjj在2006-10-4 15:50:00的发言：

7、Is X>Y?

1). (X-Y)/X>0

2). (X^2-Y^2)/X^2>0

E
   

我选A，

8、A plane traveled k miles in the first 96 minutes of flight time. If it completed the remaining 300 miles of the trip in t minutes, what was its average speed, in mils per hour, for the entire trip?

（300+K）/（96+t）
   

 还要除以60分吧

 还要除以60分吧

 还要除以60分吧

9、Is the positive integer x an even number?

1). If x is divided by 3, the remainder is 2

2). If x is divided by 5, the remainder is 5

E
    

2). If x is divided by 5, the remainder is 5 这个怎么理解？

13、If m and n are positive integers, is m/n a terminal decimal?

1). 90<m<100

2). n=4

B
          

 terminal decimal是什么意思啊？

谢谢

 terminal decimal是什么意思啊？

谢谢

 terminal decimal是什么意思啊？

谢谢

2). If x is divided by 5, the remainder is 5 这个怎么理解？

13、If m and n are positive integers, is m/n a terminal decimal?

1). 90<m<100

2). n=4

B
          

 terminal decimal是什么意思啊？

谢谢

 terminal decimal是什么意思啊？

谢谢

 terminal decimal是什么意思啊？

谢谢

2). If x is divided by 5, the remainder is 5 这个怎么理解？

13、If m and n are positive integers, is m/n a terminal decimal?

1). 90<m<100

2). n=4

B
       

 terminal decimal是什么意思啊？

谢谢

 terminal decimal是什么意思啊？

谢谢

 terminal decimal是什么意思啊？

谢谢

第9题应该是C吧，因为除五余5就是说是5的倍数

而且要除三余二，那么末尾只能是5，8，1，3，4，7，0，4。。。2

所以联立后，只有末尾是0的才同时满足两个条件

jinghezhao

感谢！

但是，这两题目是不是有错误？望ＬＺ大侠指点！

4. Is the positive integer x an even number?

1). If x is divided by 3, the remainder is 2

2). If x is divided by 5, the remainder is 5　　（Ｘ／５还余５，那不就是Ｘ可以被５整除吗？有这样出题吗？

5. What is the tens digit of positive integer x?

1). X divided by 100 has a remainder of 30

2). X divided by 100 has a remainder of 30　　（这里１）和２）两个选项怎么一样？有这样出题的吗？

findjuhl

以下是引用jinghezhao在2006-10-4 16:01:00的发言：

感谢！

但是，这两题目是不是有错误？望ＬＺ大侠指点！

4. Is the positive integer x an even number?

1). If x is divided by 3, the remainder is 2

2). If x is divided by 5, the remainder is 5　　（Ｘ／５还余５，那不就是Ｘ可以被５整除吗？有这样出题吗？

5. What is the tens digit of positive integer x?

1). X divided by 100 has a remainder of 30

2). X divided by 100 has a remainder of 30　　（这里１）和２）两个选项怎么一样？有这样出题的吗？

重要的是掌握思路，这样的题怎么解。。。记忆肯定会出错的么，更何况老外。

晶莹

请问lz从哪个bbs找到的jj啊～～～

findjuhl

以下是引用晶莹在2006-10-4 16:19:00的发言：
请问lz从哪个bbs找到的jj啊～～～

印度人给我的

十八木耳

以下是引用jinghezhao在2006-10-4 16:01:00的发言：

感谢！

但是，这两题目是不是有错误？望ＬＺ大侠指点！

4. Is the positive integer x an even number?

1). If x is divided by 3, the remainder is 2

2). If x is divided by 5, the remainder is 5　　（Ｘ／５还余５，那不就是Ｘ可以被５整除吗？有这样出题吗？

5. What is the tens digit of positive integer x?

1). X divided by 100 has a remainder of 30

2). X divided by 100 has a remainder of 30　　（这里１）和２）两个选项怎么一样？有这样出题的吗？

说的好！！！

jinghezhao

大家讨论一下这几道题吧：

7、Is X>Y?

1). (X-Y)/X>0

2). (X^2-Y^2)/X^2>0

E
            

我也是E

8、A plane traveled k miles in the first 96 minutes of flight time. If it completed the remaining 300 miles of the trip in t minutes, what was its average speed, in mils per hour, for the entire trip?

（300+K）/（96+t）
        

我是60（300+K）/96+T,因为问得是in mils per hour?

 

 

9、Is the positive integer x an even number?

1). If x is divided by 3, the remainder is 2

2). If x is divided by 5, the remainder is 5

E
                

 因为本题2）有错，我姑且把题改为

2). If x is divided by 5, the remainder is 3

我的答案仍是E

2). If x is divided by 5, the remainder is 3

我的答案仍是E

 因为本题2）有错，我姑且把题改为

2). If x is divided by 5, the remainder is 3

我的答案仍是E

2). If x is divided by 5, the remainder is 3

我的答案仍是E

10、What is the tens digit of positive integer x?

1). X divided by 100 has a remainder of 30

2). X divided by 100 has a remainder of 30

这个题有问题吧 
                

 因为本题2）有错，我姑且把题改为

2).X divided by 110 has a remainder of 30 ；

我的答案仍是A

2).X divided by 110 has a remainder of 30 ；

我的答案仍是A

 因为本题2）有错，我姑且把题改为

2).X divided by 110 has a remainder of 30 ；

我的答案仍是A

2).X divided by 110 has a remainder of 30 ；

我的答案仍是A

 

 

11、In the xy-plane, are the points (r,s) and (u,v) equidistance from the origin?

1). r+s=1

2). u=1-r and v=1-s

不会做
        

A和B肯定不行，（1）+（2）方程联立后可得U=S和V=R，我的答案是C

 

 

12、Working independently, Tina can do a certain job in 12 hours. Working independently, Ann can do the same job in 9 hours. If Tina works independently at the job for 8 hours and then Ann works independently, how many hours will it take Ann to complete the remainder of the job?

（1-1/12 * 8）/（1/9）
            

 我的做法和答案是[1-8*(1/12)]/(1/9)=3H

 我的做法和答案是[1-8*(1/12)]/(1/9)=3H

13、If m and n are positive integers, is m/n a terminal decimal?

1). 90<m<100

2). n=4

B
                

 什么是teminal decimal?s是非循环和可除尽的小数吗？若是，则

我的答案是B

14、Mary has 11 more nickels than quarters. How many coins does she have if the total value of her coins is $2.65?

 什么是teminal decimal?s是非循环和可除尽的小数吗？若是，则

我的答案是B

14、Mary has 11 more nickels than quarters. How many coins does she have if the total value of her coins is $2.65?

设quarter 有X个，0.05（X+11）+0.25X=2.65   X=7  total:7+18=25
            

关键是这句如何精准理解Mary has 11 more nickels than quarters。是M有若干个0.25或1/4的镍币外还有11个其他分值的镍币吗？若是，哪本题就是等于求解：quarterde 数量的币值之和+11个镍币的币值之和=2.65了。

但是还是不理解LZ 的0.05（X+11）的意义。恳请LZ详解。另外，最好能把美国的钱币概念在此普及一下！

 

 

15、A and B are in a line to purchase tickets. How many people are in the line?

1). There are 15 people behind A and 15 people in front of B

2). There are 5 people between A and B

C

我的答案是。因为尽管A 前和A 后及B 前B 后的数据都有了，但A 和B 谁前谁后则未定，因为将会导致结果。

请大家继续讨论本老菜鸟的跟贴！多谢！