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Re: Unbelievable Math Problem!

Posted by Steve on 1/26/08

If anyone is interested, here is an analysis that may shed

some light if needed.

1. Key in the first three digits of your phone number (NOT the

Area code)

Start with the first 3 digits of your phone number, we can

use 123 as an example.

You will also need a number that begins with the first 3

digits of your phone number and has 4 zero’s at the end. If

you multiply 123 by 10,000 you would get 1230000. You could

add the last four digits of your phone number (we can use

4567) to this and get your complete phone number:

1230000 + 4567 = 1234567

2. Multiply by 80

This is a start, 80 X 123 is not 1230000, but keep in mind

that if you multiply 123 X 80 X 250 you would get 2 X

1230000, which would be easy to get back to 1230000 if you

divided by 2.

3. Add 1

Don’t worry, if you add 1 to 80 X 123 before you multiply by

250, you can still back this out later when you subtract

250. Adding (1 X 250) – 250 is the same as adding 0.

So far, we have (123 X 80) + 1.

4. Multiply by 250

So now we have (123 X 80) X 250 + (1 X 250), which is the

same as (2 X 1230000) + 250. Later we will subtract the

250 and divide by 2.

5. Add the last 4 digits of your phone number

We could have waited until the end to add the last 4 digits

to 1230000, but since we are doing it now we will have to add

it twice in order to get back to it when we divide by 2.

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

So now we have (123 X 80) X 250 + (1 X 250) + 4567 +

4567,

which is the same as

(2 X 1230000) + 250 + (2 X 4567).

7. Subtract 250

Now we start simplifying back to our phone number. We remove

the 250 from above by subtracting and get (2 X 1230000) + (2

X 4567).

8. Divide number by 2

Then we knock it down to half, by dividing by 2 we get

(1230000 + 4567).

VOILA!

1230000 + 4567 = 1234567.

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