Unbelievable Math Trick

[Odie 0]

This comes from favorite radio station in San Diego. It really works!!!

 

Here is the unbelievable math trick

Monday, April 24, 2006 at 10:39am

 

Grab a calculator (you can't do this in your head).

 

Put in the first 3 digits of your phone number (NOT the area code)

Multiply by 80

Add 1

Multiply by 250

Add the last four digits of your phone number

Add the last four digits of your phone number again

Subtract 250

Divide by 2

Recognize the number?

Ta-da!!!!!!

[MrPsychic 1]

Pretty cool, math can do all sorts of things

[Theunicornhunter 2]

Okay lets look at this

 

if you look at what you're doing - when you multiply 80 * 250 you're really multiplying your first three digits by 20000 - but later when you divide by two you're really only multiplying by 10000 which added to any 3 digit number will give you ###0000 which is basically your first three digits plus the spaces (zeroes) where you'll add your last four digits. You add those digits twice because you'll be dividing by two so really you're only adding your last 4 digits to ###0000. The adding 1 kind of throws you off but you subtract the 250 (remember you added the one before you multiplied by 250) before you divide by 2.

 

So in essence you're multiplying your first 3 digits by 10000, adding & subtracting 250, and adding your last four digits

[Kor37 9]

Okay lets look at this

 

if you look at what you're doing - when you multiply 80 * 250 you're really multiplying your first three digits by 20000 - but later when you divide by two you're really only multiplying by 10000 which added to any 3 digit number will give you ###0000 which is basically your first three digits plus the spaces (zeroes) where you'll add your last four digits. You add those digits twice because you'll be dividing by two so really you're only adding your last 4 digits to ###0000. The adding 1 kind of throws you off but you subtract the 250 (remember you added the one before you multiplied by 250) before you divide by 2.

 

So in essence you're multiplying your first 3 digits by 10000, adding & subtracting 250, and adding your last four digits

 

There just one little part of your post that I don't understand. Its that part right after "Okay lets look at this"....

[Stephen of Borg 2]

pretty cool

[LordOfTheBorg 1]

worked, but only without the scientific version on Windows Calculator...

[LouiseTrek 0]

Doesn't work for me, guess it's because I'm british and only have a 6 digit phone number

[mfa_angelfire 0]

that is cool