Cool Math Trick

This math trick is really cool. Just try it!

1. Grab a calculator (You won't be able to do this one in your head)
2. Key in the first three digits of your phone number (NOT the area code-if your number is 01-123-4567, the 1st 3 digits are 123)
3. Multiply by 80
4. Add 1
5. Multiply by 250
6. Add the last 4 digits of your phone number
7. Add the last 4 digits of your phone number again
8. Subtract 250
9. Divide number by 2

Do you recognize the answer?

[from TarTee]

67 comments:

Jason said...

nice trick. To the non math nerds, it works out to:

x = first 3 digits of phone number
y = last 4 digits

=[250(80x+1) + (2y - 250)] / 2
=[20000x + 250 + 2y - 250] / 2
=[20000x + 2y] / 2
= 10000x + y
= your phone number :)

Anonymous said...

Sorry mate, not even close.. yes, i did the maths right, i did it 3 times just to be sure.

guess it dont work with english phone numbers.

Anonymous said...

Lol this Totaly WoRKed ProPs

Anonymous said...

Here's another cool tric. You take the first three digits of your phone number. Then you take the last 4 digits of your phone number.
Put them next to eachother in that same order.

tadaa!

mark said...

doesn't seem to workf or canadian numbers :(

Anonymous said...

DOESNT WORK IF YOUR PH# ENDS WITH 0. IE 0356

Anonymous said...

man, i hate these maths 'magic' - it is like saying "take the number of brain-cells you have, now add one to it, now subtract one from it. Ta-da! your original number!!"

BTW if you want one that works with UK phone numbers (if you hate life) then try this :

take the first 3 digits of your phone number (not area code) and multiply them by 24
add 5

multiply by 125

Add the last 3 digits of your phone No.
Add the last 3 digits of your phone No. again.
Add the last 3 digits of your phone No. again.

divide it by 3000000 and add the digits of your area code then divide by 1000. (you need a computer calculator to display all the digits.

TA-DA! another stupid trick!

Anonymous said...

blast, forgot the "subtract 15000" inbetween adding last 3 digits and dividing by 3000000

also, divide by 10000 not 1000

Anonymous said...

It works, just remember when using the calculator on the computer to hit equals after every time you do shit.

Flow said...

doesn't work with german numbers either.

Anonymous said...

it doesnt work with english numbers coz they are 6 digitsa where american ones are 7. trust the americans to be different to the rest of the world... starting wars, electing bush, and the best one 'sod global warming, we sort it when it hapopens' its happening !!!!!!

Anonymous said...

It seems to me like you are having trouble typing, why don't you get that cock out of your mouth so then you can type better?

Anonymous said...

Australian phone numbers have eight numbers. :/. no.. im not including the area code...

Anonymous said...

Actually the person who said english numbers have 6 digits is wrong. Different areas in the uk have different amount of digits.

I have 7 in mine, not including area code.

Anonymous said...

mine has 8... it works.. even if i tried using 1st 4 numbers instead of 3... and it gives me the full 8 numbers back

Swanie said...

Hi all,

It should work with any number. Doesn't matter anything as long as you put 3 digits for the first number and 4 digits for the second.

Here is the trick as Jason proved too.
answer = [{[(n*80)+1]*250}+2*y-250]/2;
= [{(n*80*250)+1*250}+2*y-250]/2;
= [n*80*250 + 250 + 2*y - 250]/2;
= [n*80*250 + 2*y]/2;
= n*40*250 + y;
= n*10000 + y;

So if n = 123 and y = 2345, then
answer = 1230000 + 2345 = 1232345

if n = 001 and y = 0879, then
answer = 0010000 + 0879 = 10879 = 0010879

So, strange?? yes or no :p

Anonymous said...

It dosent work with danish numbers, either!

Anonymous said...

It dosent work with danish numbers, either!

Anonymous said...

it works with any 7 digit number

Anonymous said...

you have to press equals after each instruction other wise it wont work... it does work with english numbers!

Anonymous said...

Does not work when your last 4 digits start with 0. Calcs dont add that 0. Math sucks! LOL So this is what my math teacher ment when she said I need math in the real world!

Anonymous said...

After reading all your posts, then picking myself up off the floor from laughing so hard.... I tried it! It definitely works on Canadian #'s. I tried it a few times without it coming close to my phone number, then I took the advise of the the person who pleaded that we press the = sign afer each instruction (he/she was right).

MisterCabron said...

i got one for all of you!

take the first three digits of your telephone number, multiply them by 10 and the result is the times you gotta shove a broom up your ass.

taaaa-fuckin-daaaaaaaaaaaa.

Anonymous said...

fuck that english toolbag thats ripping on America.. he's just jealous because his country is run by a bunch of pussies and everybody knows it.

Anonymous said...

"...he's just jealous because his country is run by a bunch of pussies..."

This from a person who's county is run by someone called "Bush". Who said you guys had no sense of humour.

Anonymous said...

yeh right he is jealous of america, he wishes his country was arguably the most hated nation in the world, was the land of the obese and not so intellectuals, gave us industrialisation, introduced agriculture, and merchantilism, not to forget democracy lol, oh no sorry must have had you confused with the rest of the world i meant to say introduced us to mcd's. So i think the question is to be a pussy and have a brain, or to be dunce and pride yourself on the fact that your complete ideology is based around what exactly?? oh i remeber something to do with 'god bless america' what god would that be? the one in rome, in israel, in arabia, in, china, in india, in the uk? whose god is supose to be blessing you exactly, oh yes i forgot again was mistaking you for the rest of the world... but i supose we can be jealous of your ableness to kill without regard, and only some americans would think that was something to be jealous off, some like you.

No offense to normal americans which most of you are, and your country does have many good things but alas there are some nobheads which seem to take pride in the wrong things and feel their country looks better by slating someone elses so i thought he should have some of it in return as anything else would have gone over his head.

Back to dl. *bows*

Anonymous said...

Wasnt it the English who started the internet, now thats something to be jealous of.

Anonymous said...

the english are better than any fuckin americans

Anonymous said...

now this is weird: i did the trick and it didn't work - or that's what i thought! 'cause when i dialed the number i got in the end, my mailbox picked up! but it wasn't my number! does that mean i'll die in seven days or something like that?

Anonymous said...

seriously wtf... if you even have a basic comprehension of math and look at the problem for about 2 seconds its apparent that firstly the 250s cancel eachother out (a very tired way of thinly disguising the intent of the equation)... and oh lets think, 80 * 250 / 2... OMFG that makes 1000! heyyyyy thats clever!!!!

get a life

Anonymous said...

" Anonymous said...

Wasnt it the English who started the internet, now thats something to be jealous of.

December 11, 2005 1:07 AM "

No, but neither did america. The Internet was invented by CERN in switzerland.

Anonymous said...

Yes, these "maths tricks" that people forward in emails and everything are completely laughable to anyone with an iq above about 40. Seriously.

Anonymous said...

Fuck brits fuck the US of fucking A Fuck every fucking corner of this forsaken world becuase all of you fucking people make me sick. All you do is bash each others countries thinking one is better than the other one, but think of this we are all different thats how we are so just get over it. becuase face the fact that if you dont, well we will end up destoying ourself with all that is going on dont you think that it's enough.m beside If you want to know the truth there is a Asteroid by the name of apophis that is going to wipe us out in 29 years. Google and you'll see for your self, it is completely pointless to worry about such petty differences when the world is in danger and we have the resourse & technology to resolve this threat if you and the rest of the world world join for once you might make it. My ceal is Kregon my mark is ADDU-TG-110-USCC. I do not care if you do this for each other just do it for your own survival. Because frankly I quite like living dont you. Oh in case you were wondering what the ceal ect. is Necronomicon givin to me by the U.S.C.C.(United States Covenant Council) U.S. Not being of america states of seventy six of the covanants.

Anonymous said...

I have no idea what the last poster was on about but they need to take their head out of their arse.

"there is a Asteroid by the name of apophis that is going to wipe us out in 29 years. Google and you'll see for your self"

Actually Google won't turn up much at all but a wiki search indicates that this asteroid is no threat at all.

Anonymous said...

I saw we should round you all up...put you in a field and...leave you there with a bunch of sheep to shag you bunch of faggots!.
Thats aimed at the gung-ho wannabe heroes that turn a post about a maths trick into a race hate...shame on you!.
Now going back to the ACTUAL topic in hand...the trick is mildly amusing but as plenty have said..its dependant on your number not having a zero at the start of either the first three or last four numbers...and I'm leavin it there cuz anymore talk on this is a distraction from nickin another movie :).

Anonymous said...

Why are you all so fucking stupid, to make the trick work u can use any phone number as long as:
Where it says the "first 3 numbers" if your number is more or less then 7 digits you simply take "the number of digits in your phone number, subtract by 4"
IF your number starts with 0 then it won't work and its just bad luck for you coz the rest of us have numbers which start with a non-zero.

freebies said...

ok I dbl checked and it works for Canadian numebers too... and perhaps others? I'm guessing ppl misinterpeted it when it comes to:

6. Add the last 4 digits of your phone number
7. Add the last 4 digits of your phone number again

So, if your last 4 digits are 4587, DO NOT add 4+5+8+7, but add 4587.

try it out!

Anonymous said...

here is another nice tricked was passed on to me b y my dad:

1. take a calculator
2. type in "12345679" (no 8)
3. times it by any number multiplied by 9,
lets say you want 5, 5*9=45, so 12345679*45=?

try multiplying by: 9,18,27,36 and so on...

Anonymous said...

I just have to agree with post #33.

Anonymous said...

man some people on this site dumbasses..obvioiusly this was posted by someone with a 7 digit phone number(who's gona sit and try to figure this out for anything differnt from their own?)Yes it works for canada and the states coz they got 7 digit phone numbers(without the area code).... And for the record BUSH is an idiot..we all know it..u can be proud bout being american but don't defend an idiot...Mind u some americans are dumbasses... Seriously for the 10th billion time
WE(canadians) don't live in iglos and our bankin machines are not made of ice

Aghaster said...

It did work with my number (Quebec, Canada)

But this trick is lame. It would have been kewl if it really was something useful, like finding another part of a phone number or other info using some part of it with some math calculus.

Anonymous said...

this doesnt work with the emergency number in the u.s. (911)

John Wiseman said...

No dice with Canadian numbers.

footballplayr69 said...

if anyone cuts down the country I live in, or the president that runs it, I will be very disapointed, because I support our president, the war, and the democracy that we have and that we are setting up in iraq

d'elegance said...

"" Anonymous said...

Wasnt it the English who started the internet, now thats something to be jealous of.

December 11, 2005 1:07 AM "

No, but neither did america. The Internet was invented by CERN in switzerland. "




you're all wrong. ARPANET, the precursor to the internet was an [b]American[/b] project. In to 90's CERN was the one who was responsible the WWW project and the first ever web pages.

Anonymous said...

In Holland, it adds a 'zero' in the result.

Anonymous said...

it works even when the last 4 numbers stasrt with 0.

Anonymous said...

The thing with 12345679... that's actually pretty interesting, I remember it from before... here's how it works

37 * 3 = 111
37037 * 3 = 111111
37037037 * 3 = 111111111

37 /3 = 12.333
37037 /3 = 12345.666
37037037 /3 = 12345679

oh here's another trick for squaring numbers

X^2 = (X-1)(X+1) + 1... and also
X^3 = ((X-1)(X+1)X) + X... because you just take the first equation and multiply by X

it's all simple grade... something math... you could even do
X^2 = (X-73)(X+4) +292, if you wanted to...

jms said...

If your phone number is 6 digits then in the step 2:

2. Key in the first two digits of your phone number, the 1st 2 digits are 123)

And if your phone number is 7 digits then in the step 2:

2. Key in the first three digits of your phone number, the 1st 3 digits are 123)

and so....

Anonymous said...

fucking nerd cunts!

Anonymous said...

fucking nerd cunts!

Anonymous said...

For all those that say "oh it doesn't work with Canadian numbers (or any 7 digit numbers), blah blah blah", You can't do it all at once. You have to do each line at a time.

Example for those who STILL don't get it:

Phone number: 987-6543
987 * 80 THEN PRESS EQUAL
You get your answer then ADD 1 then PRESS EQUAL
and so on and so forth.

And to the dense fuck that said "fucking nerd cunts", at least we use our brains for something; the only thing you probably do is give all the blood in your head to blood boy down there. gtfo. kthxbye.

Anonymous said...

OMG this is so cool. Chin pie!

Guest said...

Why does this math "trick" work for all americanized telephone numbers?

Candi said...

sparkling-paradise56.piczo.com

hey, peeps try this..its so fuckin funny!!!

okay
Pamela Anderson weighed 69 pounds
( type 69 )
she figured she was 222 fat!
( type 222 )
So she went to Doctor X
( click X )
And he gave her 8 pills
( type 8 )
Then she came out...
( turn calculator upside down )


haha. hell yea.

candi said...

okay okay wait wait wait lol did it wrong

Right way::

okay
Pamela Anderson weighed 69 pounds
( type 69 )
she figured she was 222 fat!
( type 222 )
She wanted to be 51 pounds
( type 51 )
So she went to Doctor X
( click X )
And he gave her 8 pills
( type 8 )
Then she came out...
( turn calculator upside down )

Anonymous said...

for some stupid smart arse who said that any one with "basic mathematical comprehension" fackk aff, the two 250s do not cancel each other out, actually.
hmmph, that was just annoying me.
=\

Anonymous said...

ok.. to all the stupid people saying that it doesn't work with danish or english numbers... it works with any 7 digit number, learn to use a calculator.. and its a stupid trick.. 2+2-2=2...

Anonymous said...

YOU SHOULD MENTION THAT THIS TRICK HAS TO BE USED ONLY WITH 7 DIGIT NOS. most of the nos out here are 10 digit dude

Anonymous said...

IT DOESNT WORK WITH MARTIAN NUMBERS

Anonymous said...

1+1=2 and stuf like that

Anonymous said...

Hello world whats up (or down)!=>

Anonymous said...

This is wrong, it does not work with my phone number. (928)345-5101. As a matter of fact my phone number stopped working after doing this.

Anonymous said...

what is wrong with you people its a simple math problem for people to laugh at or enjoy yet some guy has to complain about his country not having 7 digits in his phone number and now everybody is arguing over whos country is better and who invented the internet and shit like that...it is a stupid math problem!do it laugh a little and get the hell on with your lives!!!

Anonymous said...

All of you are idiots!
Just comment like Yes, its a good trick! or it sucked, who cares about who invented internet or whoz contry is betta!

Anonymous said...

WOW PEOPLE.
THIS WAS MENT TO BE A FUN TRICK TO DO. NOT SOME WAY FOR PEOPLE TO CUT DOWN WHAT NOT OR FIGHT. JUST SAY 'OH COOL' OR 'I'VE SEEN THAT B4, ITS FUN!' YOU DONT HAVE TO LEAVE RUDE AND SWEARING COMMENTS LIKE THAT. IT MAKES YOU LOOK MEAN. SO JUST STOP.....FOR THOSE OF YOU WHO DONT GET IT HERE:



i've seen this trick before, its really cool and ammusing.

YO MAMA said...

americans are bunch of sissy girls...they keep bulldog ballerinas in their closets..

Post a Comment