小學

A class of students bought and equally distributed a certain number of notebooks, If the notebooks are distributed to girls only, each girl will receive 15 notebook. If the note book are distributed to boys only, each boy will receive 10 notebook, If the notebooks are equally distrubuted to everyone in the class how many note books will each student receive?
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寫過程並解答

a,band c are two-digit numbers. Then unit digit of a is 7, the unit digit of b is 5 and the tens digit of c is 1. If a*b+c=2006, find the value of a+b+c
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A circular bicycle path is 1km long. Dodi rode a bicycle for two rounds at the speed of 30kph. If he wants to average 40kph, what should be his speed for the next four rounds?
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並解答和過程

Lily plans to spend all of her $31 to buy different types of pens that cost $2,$3and $4 respectively. If she wants to buy at least 1 pen of each type, What is kthe maximum number of pens that she can buy?
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這是我看了一本英文邏輯書而來的，現在我把它翻譯給大家來想想看?唉！要開學囉！就不能常上網…。大概只有今明兩天可以任意那麼長時間瀏覽。最後，祝大家開學愉快！翻譯題目如下：

在一次國際會議上，有21個人會講法語，有21個人會講英語，21個人會講德語。但與會人數遠小於63，因為有些人會說幾種語言。

事實上，所有的可能性不外乎：有些人只會說一種語言，有些人只會說兩種，甚至有些人三種都會說。

如果把會說某種語言的人稱為一個組，那麼在這個組內，只會說某兩種語言的人(類似地，只會說這種語言的人，三種語言都會說的人)就稱為一個小組。

這裡任何一個給定的組，其各小組的人數都不相同(但至少3人)。人數最多的小組是由那些只會說法語的人組成的。試問：會說英語和德語，但不會說法語的人有多少？

請問十"幾"有含10?是10-19還是11-19?

A small regular hexagon is inscribed in a circle. A large regular hexagon circumscribes the circle, as shown in the figure. If the area of the large regular hexagon is 10 square units, Find the are of the small hexagon.

From the natural number 1 2 3 4 5......, delete the multiples of 2 and the multiples of 3, but keep the multiples of 5. the remaining numbers are:
1,5,7,10,11,13,15,17,19,20,23,25,29,20......
In this sequence, what is the 2006th number?

Peter playsa game of darts. On the target shown below each circle has a different score 11 13 31 33 42 44 46. What is the minimum number of hits that he must throw in order to score exactly 100 points?

按順序123456789在其間僅插入若干運算符號+,-*,/,已知有162種組合可使結果為10
其中僅有一種組合沒有用到+,-運算,請寫出此唯一組合.