Key-in the first 4 digit of your handphone number into the calculator
Multiply by 80
Plus 1
Multiply by 250
Plus last four digit of phone number
Plus last four digit of phone number again
Minus 250
Divide by 2
Is that your mobile number?
It works for mobile numbers in Singapore.
At least for mine and my wife's.
Not sure about mobile numbers in other countries.
Blog and Artwork updates of Singapore caricaturist, portrait artist and illustrator - Jit
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