multiplication(+)multiplication(-)divide
1) key-in the first 3 digits of your handphone number not the
01-number) into the calculator
2) multiply by 80
3) add 1
4) multiply by 250
5) plus last four digits of phone number
6) plus last four digits of phone number again
7) minus 250
8) divide by 2 at last > > > Is it your handphone number????
AMAZING!!!!!
posted by Philip at Saturday, April 09, 2005
3 Comments:
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It's not amazing. It's algebra. Let a be first 3 digits. Let b be last 4 digits. The formula simplifies to : (20000a + 250 + 2b - 250) / 2 which is actually 10000a + b.
whoever comes out with the time to do that either already though about doing something like that and came out with that straight away, or really wasted some time doing that. I totally think it's great, and hard to detect, but it's still decodable. Good way to mess with someone's head though ^_^
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