Reply
Sat 17 Sep, 2005 03:20 pm
1.key in the first 3 digits of your phone number -not the area code
2. multipy by 80
3. Add 1
4. multiply by 250
5. Add the last 4 digits of your phone #
6. Add the last 4 digits of your phone again
7. Subtract 250
8. Divide by 2
Start taking it apart.
Step 7 undoes the effect of step 4 on step 3. You can remove steps 3 and 7 without affecting the answer.
Step 8 can be eliminated by removing step 6 and changing step 2 to multiply by 40.
That leaves:
3-digit prefix * 10000 + last 4 digits
I like this
I'm gonna use it on a quiz to see how well people follow simple directions. If done correctly it has one of those 'aHa' hooks at the end.
Thanx
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