I want to see if this works for everyone

Note this will only work with 7 digit phone numbers and you must press equals after each step.

1. Type the first 3 numbers of your phone number in a calculator
2. Times that by 80
3. Add 1
4. Times by 250
5. Plus the last 4 digits of your number
6. Plus the last 4 digits of your number again
7. Subtract 250
8. Divide by 2

does the number look familiar?

You know, in Danish, a skok means an undefinable, but pretty large amount of something?

I tried it and that number definitely rings a bell!

A little extra humor for you (very little).

Jim

I either have an 11 digit phone number or a 6 digit (excluding area code) so how does that work then?

My math teacher had us try this last year. I guess some people have no lives so they come up with stuff like this. 

ApplePie wrote on Jan 14^th, 2010 at 9:18pm:

Comes under the heading of... "too much time on their hands".

Spoiler Alert

Many of these tricks use variations of the same mechanic. Once you know the trick it takes all of 5 minutes to break it down... or make a new one. It's all algebra:

Take a phone number (ex. 123-4567)
Break that down into x-y (ex. x = 123, y = 4567)

Now write out the steps like you would an algebra problem:
(((x * 80) + 1) * 250 + y + y - 250) / 2

Now start simplifying:
((80x + 1) * 250 + y + y - 250) / 2
(20,000x + 250 + y + y - 250) / 2
(20,000x + 250 + 2y - 250) / 2
(20,000x + 2y) / 2
10,000x + y

That'd give you an answer in the format of XXXYYYY, same ast the phone number you started with... This one only works properly when y is 4 digits or less, which is why it only works for 7 digit phone numbers.

I'm pretty sure I left school yesterday...