Tuesday, April 15, 2008

Fun With Numbers

It's April 15th...have you done your taxes? We haven't. Thank goodness the IRS allows for filing an extension, and thank goodness for accountants! Ours makes life a lot easier. Anyway, in honor of Tax Day, here's a fun little exercise to do, so get a calculator!

1. Type in the first three digits of your phone number (not the area code).
2. Multiply by 80.
3. Add 1.
4. Multiply by 250.
5. Add the last four digits of your phone number to the total.
6. Add the last four digits of your phone number again.
7. Subtract 250.
8. Divide the number by 2.

Do you recognize the answer? How does that work!?


Katie said...

F = First 3 digits of phone #
L = Last 4 digits of phone #

= F x 80 + 1 x 250 + 2L -250 / 2
= [250 x (80F + 1) + 2L -250 ]/2
=((250 x 80F) +250 +2L -250)/2
=(20000F + 2L)/2
= 10000F + L

ex: if phone # = 1234567
10000F + L = 1230000+4567 = 1234567

Donna said...

I should have known that you would be able to tell me literally how that works. Wow, I'm really impressed that you figured out the formula behind it! How did you do that??

Alyson said...

I'm sorry, I'm not getting it. I tried it over and over, but I'm not getting a special number. Perhaps it's because I'm a complete moron at math!

Katie said...

Algebra, my dear Watson!

Donna said...

It works! The final number should be your phone number.

Alyson said...

I tried it several times and it didn't work. Very weird!