# 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.
...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.

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 fiveTo prove that 4 = 5.Since,-20 = -2016 - 36 = 25 - 454^2 - 9*4 = 5^2 - 9*54^2 - 9*4 + 81/4 = 5^2 - 9*5 + 81/4(4 - 9/2)^2 = (5 - 9/2)^24 - 9/2 = 5 - 9/24 = 5What is wrong here?`

More Stuff at www.TheMathWebSite.com.

### Equal Numbers

`All Numbers are EqualTo prove all numbers are equal.Choose a & b, and let t = a + b. Thena + b = t(a + b)(a - b) = t(a - b)a^2 - b^2 = ta - tba^2 - ta = b^2 - tba^2 - ta + (t^2)/4 = b^2 - tb + (t^2)/4(a - t/2)^2 = (b - t/2)^2a - t/2 = b - t/2a = bThus, 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 = cThen4a - 3a + 4b - 3b = 4c - 3cRearrange terms4a + 4b - 4c = 3a + 3b - 3cRemove constants4 * (a+b-c) = 3 * (a+b-c)Remove brackets4 = 3What 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 & beardd:-) Wearing a baseball hati-( 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 smiley8-) 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 outยง:-) 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

More Stuff at www.TheMathWebSite.com.

### 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.