Unbelievable math trick!!!!

[Civickiller80]

This works and its amazing...I got my home phone number and my cell number to do this...follow each step


UNBELIEVABLE MATH PROBLEM

Here is a math trick so unbelievable that it will stump you.

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?

 

[Xilo Z]

I guessed it would do that, but it's cool

 

[member006]

:eek: Wow that is way cool. I will send this to some of the younger set in my ******. They will have fun in school with it. :thumbsup:

Thanks that was fun.

LL:angels:

 

[Stevie]

Not bad, but not very "unbelievable." All these little math tricks have a reasonable explanation. Here's this ones:

Supposing your phone number is represented by:
abc-defg

You could write the first number (1st 3 digits) as:
100a+10b+c

And the second number (last 4 digits) as:
1000d+100e+10f+g

Then the whole expression would come out to:
(((100a + 10b + c)(80) + 1)(250) + 2(1000d + 100e + 10f + g) -250) / 2

If you expand that you will get:
1000000a + 100000b + 10000c + 1000d + 100e + 10f + g

Therefore appearing on the calculator in the same order as in the original phone number:
abc-defg

 

[sandee's_fun]

lol Good stuff :thumbsup: ...and nice work Stevie :thumbsup:

 

[Xilo Z]

cool

I like understanding how these tricks work

 

[Xilo Z]

OK
I found this algebra problem on the internet:

A ****** is 21 years older than her ***. In 6 years she will be 5 times older than him.
Where is the ******?


There is a solution, and it's awesome!
I'll check back later to see if any one got the answer; and I will post a link to where I found the video.

 

[ZoWhat]

Scary!! When I finished doing it the phone rang. Yes -- I jumped.

 

[nerd359]

Xilo Z. - He's on the floor. Because he was just told by the ***'s ****** that she's pregnant (She has 7.2 months to go).

 

[Xilo Z]

Xilo Z. - He's on the floor. Because he was just told by the ***'s ****** that she's pregnant (She has 7.2 months to go).

So, close! Actually, he's her! the *** is -9 months old

Premium Link Upgrade is the link.

 

[Stevie]

"of an year" ?

Math guy, but not an English guy. :1orglaugh .

 

[Xilo Z]

yea, I know. It annoyed me, but the it's a a great word problem

 

[blindswordsman]

That second one was really good. I cant wait to tell someone to solve it.

 

[MILF Man]

Weird how some of these formulas work out.

 

[-KING-]

Some people just have TOO much time on their hands...lol

 

[Jay1980]

I guess that was ok. If the final answer would have been my age...now that would have been "unbelievable".

 

[Xilo Z]

Some people just have TOO much time on their hands...lol

everyone on this forum, really...

 

[cabey]

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Huh???

 

[drdeath67]

Cool!

 

[Legzman]

I guessed that's what it would be before I even did it.