Kevin Tarr wrote:
>
> 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
= ((80X + 1)(250) + Y + Y - 250)/2
= (20000X + 250 + 2Y - 250)/2
= (20000X + 2Y)/2
= 10000X + Y
> Do you recognize the answer?
Yeah.
Julia
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