Here is a math trick so unbelievable that it will stump you.
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
Do you recognize the answer?