Interesting Mathematics
1. Grab a calculator (You would not be able to do this one in your head)
2. Key in the first three digits of your phone number (Not number 6 or 9)
3. Multiply by 80
4. Add 1
5. Multiply by 250
6. Add the last four digits of your phone number
7. Add the last four digits of your phone number again
8. Subtract 250
9. Divide the number by 2
10. Recognise the answer?
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