High School Math

MISSION STATEMENT: To encourage and promote a greater use of the internet and computer technology in the math classroom. For educators, students, parents and homeschoolers.

Thursday, October 30, 2008

Math Card Trick



Ask someone to choose a card.
Ask them to remember it's numerical value
(Ace = one, Jack = 11, Queen = 12, King = 13).
And also to remember the suit of the card.

  Tell them to
...double the value of the card.
...add three to the total.
...multiply the result by five.

  Now, tell them if the card is
...a diamond they must add one.
...a club they must add two.
...a heart they must add three.
...a spade they must add four.

Ask them for their final total.
And tell them their card from their total.

  The Secret:
The total will have two or three digits.
Mentally subtract 15 from their total.
The last digit gives the suit
(diamonds 1, clubs 2, hearts 3, spades 4.)
while the first number(s) gives the suit.

  Example: Jack of clubs
11 doubled is 22, add 3=25,
multiply by 5=125, add 2 for clubs=127.
Subtract 15 mentally, the result is 112.
Last number (2) means clubs,
first number (11) means Jack.

More Stuff at www.TheMathWebSite.com.

Friday, October 17, 2008

Four Equals Five



Four is equal to five
To prove that 4 = 5.
Since,
-20 = -20
16 - 36 = 25 - 45
4^2 - 9*4 = 5^2 - 9*5
4^2 - 9*4 + 81/4 = 5^2 - 9*5 + 81/4
(4 - 9/2)^2 = (5 - 9/2)^2
4 - 9/2 = 5 - 9/2
4 = 5
What is wrong here?

More Stuff at www.TheMathWebSite.com.

Equal Numbers



All Numbers are Equal
To prove all numbers are equal.
Choose a & b, and let t = a + b.
Then
a + b = t
(a + b)(a - b) = t(a - b)
a^2 - b^2 = ta - tb
a^2 - ta = b^2 - tb
a^2 - ta + (t^2)/4 = b^2 - tb + (t^2)/4
(a - t/2)^2 = (b - t/2)^2
a - t/2 = b - t/2
a = b
Thus, all numbers are equal. Why?

More Stuff at www.TheMathWebSite.com.

Four Equals Three



Four Equals Three?
Let us prove that 4=3.
Suppose:
a + b = c
Then
4a - 3a + 4b - 3b = 4c - 3c
Rearrange terms
4a + 4b - 4c = 3a + 3b - 3c
Remove constants
4 * (a+b-c) = 3 * (a+b-c)
Remove brackets
4 = 3
What is wrong here?

More Stuff at www.TheMathWebSite.com.

Monday, October 13, 2008

ASCII ART



.-.' '.-.
.-( \ / )-.
/ '..oOOo..' \
, \.--.oOOOOOOo.--./
|\ , ( :oOOOOOOo: )
_\.\/| /'--'oOOOOOOo'--'\
'-.. ;/| \ .''oOOo''. /
.--`'. :/|'-( / \ )-'
'--. `. / //'-'.__.'-;
`'-,_';// , /|
'(( |\/./_
\\ . |\; ..-'
\\ |\: .'`--.
\\, .' .--'
))'_,-'`
//-'
//
//
|/
        
.n. |
/___\ _.---. \ _ /
[|||] (_._ ) )--;_) =-
[___] '---'.__,' \
}-=-{ |
|-" |
|.-"| p
~^=~^~-|_.-|~^-~^~ ~^~ -^~^~|\ ~^-~^~-
^ .=.| _.|__ ^ ~ /| \
~ /:. \" _|_/\ ~ /_|__\ ^
.-/::. | |""|-._ ^ ~~~~
`===-'-----'""` '-. ~
__.-' ^

Have a contest! Who can draw the best ascii picture?
More Stuff at www.TheMathWebSite.com.

Saturday, October 11, 2008

Emoticons



:-) Standard Smiley
;-) Winking Smiley
(-: Left handed Smiley
:-( Sad Smiley
:<> Smiley with beard
:-{> With mustache & beard
d:-) Wearing a baseball hat
i-( Swollen-eyed smiley
$-) Won the lottery
:-#/ Wears braces
:-~) Got a runny nose
&:) Curly haired smiling girl
:\/ Can't keep his mouth shut
:>) Nosy smiley
:-Q Smoker
:-? Pipe smoking smiley
8-) Wearing sun glasses
:-{) Has a mustache
[:-) Wearing a walkman
.-) Smiley with one eye
(:-) Bald smiley
&:-) Bad Hairday
{(:-) Smiley with a toupee
{(:{) With mustache & toupee
!- Smiley with a black eye
:-{} Wearing lipstick
@:-) guy with a turban
:~X Tongue tied
=:-O Scared
:-)8 Smiley with bow tie
:-p Tongue sticking out
:-)~ Tongue sticking out
ยง:-) Happy with curly hair
):-) Unibrow
More Stuff at www.TheMathWebSite.com.

ASCII LOGO










Create a school logo with ascii art!

More Stuff at www.TheMathWebSite.com.

Wednesday, October 01, 2008

Amusements 6










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Amusements 5










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Amusements 4










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Amusements 3










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Amusements 2










More Stuff at www.TheMathWebSite.com.