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[数学] 上海市中学生业余数学学校疑难解答

上海市中学生业余数学学校疑难解答

预备年级1997年试题
6.小明家有两个挂钟,一个每天快20分钟,一个每天慢30分钟,现在将这两个挂钟同时调到标准时间,他们至少要经过(     )天才能再次同时显示标准时间?标准答案是72天,孩子的答案144小时,请教高手哪个对?并请分析。

[ 本帖最后由 james 于 2006-8-8 09:16 编辑 ].

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谢了。.

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N=123456789可否被19整除?.

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回复 #52 炫炫爸 的帖子

你不会是熊斌的分身吧?.

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给大家出点英文数学题,题目很简单,但英文很拗口。
1.If a woman is paid c dollars per hour for every hour she works upto 8 hours and is paid double for every hour she works after 8 hours, how many dollars will she be paid for working 13 hours?.

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2.A number is multiplied by another number. The product is then divided by the difference between the two numbers. What is the result?.

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3.ABCD is a square, and E is the midpoint of CD. Find the percentage of the square that is shaded..

附件

未标题-1 拷贝.jpg (154.8 KB)

2006-7-27 21:56

未标题-1 拷贝.jpg

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做完100题,包你英文水平大幅提高。.

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4.Bill had X dollars and he bought y apples for 16cents each and z pears for 12 cents each. How many cents did he have left?.

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Answer:
1.18C
2.xy/x-y
3.75%
4.x-16y-12z
看懂了英文,题目就很简单了。.

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5.If 3 is subtracted from a certain mumber, then the result is 6 more than twice the number. Find the number..

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6.How many 29-cents stamps can be purchased for d dollars?.

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7.On a given day in February, the temperature in a town ranged from –12 to 19 degrees. What is the difference between the high and the low temperature for the day?.

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8.Four years ago my age was half of what it will be in eight years. How old am I?.

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突然发现炫爸,考兄,cool爸等躲在这个角落的原因了,两耳不闻窗外事,典型的走白专道路啊!.

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大学了还能升级?又不能做VIP,升啥级?.

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炫爸2千多贴,1千多分不还是大学。.

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升上去还要脱的?
那我宁愿不升。.

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大家认真做题,如果对英文题不感兴趣,请继续出中文题。.

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居心不良啊!.

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Answer
5.-9
6.100d/29
7.31
8.16.

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9.        One quarter of the students at a high school take algebra. One fifth of the students take geometry. The remaining 110 students do not take any math. How many students are there at the school?
10.        The sum of five consecutive integers is equal to 3 times the largest. What is the largest of the integers?
11.        A man goes to a bank with $4.00 and asks for change. He is given an equal number of nickels, dimes and quarters. How many of each is he given?
12.        The difference between the squares of two numbers is 9. The difference between the two numbes is 1. What is their sum?.

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8.
x-4=1/2(x+8)
in eight years 是指从现在算起。.

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Excellent.


附加题(选择)
Leafletting and speeching making on government property should be outlawed. Radicals and fanatics have no right to use public property when peddling their unsavory views.
The argument above is based on the assumption that

(A)radicals and fanatics prefer using public property when disseminating their views.
(B)legal restrictions that apply to one group need not apply equally to all
(C)the general public has a vested interest in the free exchange of varied political views
(D)political activity that interferes with the orderly funcitoning of government should not be protected by law
(E)all those who leaflet and make speeches on government property are radicals and fanatics..

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13.        The volume of a box is 24 cubic inches. If its length is 3 inches and its width is 8 inches, what is its depth?
14.        One third the sum of 13 and a certain number is the same as one more than twice the number. Find the number.
15.        Tom has a brother one third his age and a sister three times his age. If the combined ages of all three children is five less than twice the oldest,  how old is Tom?
16.        A woman leaves one fourth of her estate to her son and one third of her estate to her daughter. If she leaves the balance of $1,000.00 to charity, how large was her estate in dollars?
17.        A woman buys a pound of steak for $3.00. If the meat loses one fourth of its weight when cooked, what is the cost in dollars per pound when it is served at the table?
18.        A gas tank that is 1/3 full requires 6 gallons to make it 5/6 full. What is the capacity of the tank in gallons?
19.        The sum of five consecutive odd integers exceeds three times the largest by 6. Find the sum of the integers.
20.        Ten houses line one side of a street. The average space between houses is 60 feet more than the average width of each house. A sidewalk starts 60 feet before the first house and ends 60 feet after the last house. If the total length of the side walk is 3,206 feet, find the average width of each house in feet..

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回复 #647 bill的妈妈 的帖子

附加题正确答案为E。
其他都对。辛苦你了。明天再出题。
腐败的事情还是考拉操作比较顺手。.

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你们继续出中文题吧。.

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回复 #651 红眉 的帖子

网上回复最多的贴是叫做“这里有个医生,大家有问题赶快问她啊,不用白不用!”,共回帖1158贴,但LZ“ cuteyf” 积分只有358,可见回帖和LZ的积分是没有关系的。大家不要上当。.

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最近身体欠佳,时不时腹痛,拉稀,可能晚上睡觉开空调着凉了,腐败的事还是考拉等诸位先行一步吧。.

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可惜俺不是GCD啊。.

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我来出道题。

炫爸一天送10个贝给大家,手里总共有多少贝,可送几天?.

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引用:
原帖由 快乐小猪妈妈 于 2006-8-7 21:55 发表
这个话题的题目又变了,怎么LZ比女人还善变
你自己承认自己善变的。我不过是找一个合适的标题罢了。.

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回复 #1144 炫炫爸 的帖子

要不改成数学狂人乐园?.

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或者数学魅力乐园?.

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或者还是回到原来的题目?.

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老九不能走。

家是旺爸的,我们都是客。.

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