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UNBELIEVABLE MATH PROBLEM

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Cool, I like that. Though I would probably say the same thing if someone was just jingling their keys in front of me.
 
Originally posted by: dullard


Try this: Choose a number. Add one. Subtract one. Surprize! You get your number back! Why can anyone be amused my 1st grade math?
Click to expand...

FTW
 
Originally posted by: dullard
Originally posted by: zanieladie
Yeah...YOU know this...I know this...so what. It's still neat.
Click to expand...
Try this UNBELIEVABLE word problem:
1) Type your first name.
2) Add a bunch of letters to it.
3) Type your last name.
4) Delete the letters you added in step 2.
5) Do you recognize the answer?

That is neat?
Click to expand...
hehe lol 😛 QFT
 
Originally posted by: zanieladie

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) X
3. Multiply by 80 X*80
4. Add 1 X*80+1
5. Multiply by 250 20000*X+250
6. Add the last 4 digits of your phone number 20000*X+250+Y
7. Add the last 4 digits of your phone number again. 20000*X+250+2Y
8. Subtract 250 20000*X+2Y
9. Divide number by 2 10000*X+Y

Do you recognize the answer?
Click to expand...

Math wins!

Yes, my phone number is indeed X-Y.
 
Originally posted by: zanieladie

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)
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?
Click to expand...

xxx-yyyy

xxx*80
xxx*80 + 1
(xxx*80 + 1)*250
(xxx*80 + 1)*250 + yyyy
(xxx*80 + 1)*250 + yyyy + yyyy
(xxx*80 + 1)*250 + yyyy + yyyy - 250
((xxx*80 + 1)*250 + yyyy + yyyy - 250)/2
(xxx*80*250 + 250 + 2*yyyy - 250)/2
(xxx*80*250 + 2*yyyy)/2
(xxx*40*250 + yyyy)
xxx*10000 + yyyy
xxx0000 + yyyy
xxxyyyy

Amazing!

meh - get interupted in the middle of a post and dullard steals the show 😛
 
Originally posted by: dullard
Originally posted by: CPA
okay brainiac, maybe because this isn't first grade math. More like 7th.
Click to expand...
Hey, I did all that in 1st grade. Of course, my dad taught me algebra then.
Click to expand...

lol, I taught my oldest the concept of negative numbers at 4 years old. Got tired and never taught my other kids.
 
Originally posted by: Armitage
xxx-yyyy

xxx*80
xxx*80 + 1
(xxx*80 + 1)*250
(xxx*80 + 1)*250 + yyyy
(xxx*80 + 1)*250 + yyyy + yyyy
(xxx*80 + 1)*250 + yyyy + yyyy - 250
((xxx*80 + 1)*250 + yyyy + yyyy - 250)/2
(xxx*80*250 + 250 + 2*yyyy - 250)/2
(xxx*80*250 + 2*yyyy)/2
(xxx*40*250 + yyyy)
xxx*10000 + yyyy
xxx0000 + yyyy
xxxyyyy

Amazing!

meh - get interupted in the middle of a post and dullard steals the show 😛
Click to expand...

lol... yeah I was about to post something similar as to why this works as well but saw someone else already did.
 
Originally posted by: ddviper
Originally posted by: dullard
Let x=phone number divided by 10000, truncated.
Let y=truncated part
Thus, phone number = x*10000 + y

x
x*80
x*80 + 1
x*20000 + 250
x*20000 + 250 + y
x*20000 + 250 + y*2
x*20000 + y*2
x*10000 + y

All you do is input your number, manipulate it a bit, and then undo what you manipulated. Big deal that you get the same thing back.

Try this: Choose a number. Add one. Subtract one. Surprize! You get your number back! Why can anyone be amused my 1st grade math?
Click to expand...

OP Ownage

:beer: and have another :beer:
Click to expand...


What is even better is he actually took the time to write that out to prove something everyone already knew.
 
Originally posted by: BroeBo
Originally posted by: ddviper
Originally posted by: dullard
Let x=phone number divided by 10000, truncated.
Let y=truncated part
Thus, phone number = x*10000 + y

x
x*80
x*80 + 1
x*20000 + 250
x*20000 + 250 + y
x*20000 + 250 + y*2
x*20000 + y*2
x*10000 + y

All you do is input your number, manipulate it a bit, and then undo what you manipulated. Big deal that you get the same thing back.

Try this: Choose a number. Add one. Subtract one. Surprize! You get your number back! Why can anyone be amused my 1st grade math?
Click to expand...

OP Ownage

:beer: and have another :beer:
Click to expand...


What is even better is he actually took the time to write that out to prove something everyone already knew.
Click to expand...

Alot of people don't know it - they think it's some kind of magic formula. I get this a few times a year from friends and family - looking down through the chain of forwards - or sometimes in the problem statement somebody gets excited about finding some "magic formula" that all phone number conform to :roll:
 
Originally posted by: Armitage

Alot of people don't know it - they think it's some kind of magic formula. I get this a few times a year from friends and family - looking down through the chain of forwards - or sometimes in the problem statement somebody gets excited about finding some "magic formula" that all phone number conform to :roll:
Click to expand...

I didn't think it was a magic formula. I just think it's a neat thing to show people who don't understand the math behind it. It's great for kids!

 
I got a better one.

1. Go here.

2. Input your name and the state you live in.

3. IT GIVES YOU YOUR FREAKING PHONE NUMER AND ADDRESS OMGWTF!!!!
 
Originally posted by: zanieladie

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)
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?
Click to expand...

Gee...let x be the first three digits, and y be the last four digits:
(250(80x+1)+2y-250)/2 =10000x+y, which is of course your phone number.

Geez, do you even know math?
 
Let me shorten it up for you...

1. Take your first 3 numbers of your phone number (not your area code) and multiply it by 10000
2. Now add your last four digits

Ooooooo, does something look familiar?

Jesus Christ this is retarded.
 
Whop-de-friggen-do. Enter in all 7 digits of your phone number and the calculator gives you the number back. This is stupid.
 
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