Tuesday, November 3, 2009

A math puzzle

ALBERT FROM TAIWAN
As below it is a math puzzle:
A father ,who was a mathematician, "send" some amount of dollars to his son
(who also studied math abroad).
The son emailed to his father and said the amount you "send" is not enough ,please mailed "more" and then added them together make "money" and this is the amount I really want
rule :"send" is a four digits number "more" also a four digits number "money" a five digits number each letter with same alphabet must have the same number
each letter with different alphabet must have different number
question:Please find the precise amount of "money" the son really wants

Tuesday, October 13, 2009

A very hard sudoku puzzle I created with my program please try it

As below it is a very hard sudoku puzzle I created with my program please try it
x x 5 8 x 1 x 2 x
x 8 x x 4 6 9 x x
x x x x x x 1 x x
8 x x x 6 x x 7 x
x x 9 x x x 2 x x
x 5 x x x x x x 1
x x 3 x x x x x x
x x 2 1 3 7 x 6 x
x x x 9 x 5 7 x x
clues: 25
level: very hard
By :Albert.Teng From Taiwan

Sunday, October 11, 2009

I see so I believe ?

Most people will say "show me the evidence;if I can see it,I will believe it ."
Is that so ? There are lots of valuable things in the world ,which We cannot see clearly with our eyes.
Like : God,Air and Human virtues. So we should learn to observe matters by using our mind,instesd of our eyes .
There are many famous literature novels which also have mentioned this,
such as :The Little Prince,The Old Man and the Sea etc.

Saturday, October 10, 2009

Calculator suitable for high school students ?

Hi everybody:
I teach mathematics in a junior high school,after each test I must grade students' paper,a few of them get a very high score,however most of the students even cannot handle very basic and simple calculation,gradually they will lost interest.
Of course we will not allow kids using calculator to do calculation during test, I believe a lot of them using it to do their homework.
So please consider the following questions:
1. Is caculator suitable for high school students ?
2. Should school teachers or parents forbid young kids using calculating machine before they reach some level ?
Please give me your opinions on this matter