Can You Pass These Mind Tricks?

Get A Calculator. Pick a number 1-10. Multiply it by 2. +5 to the result. Multiply answer by 50. If you had your birthday this year, add 1766. If not, add 1765. Now subtract the year you were born.

A father and son went in their car for a road trip. They got in a car crash. The father died, and the son was badly injured. He needed a surgery badly. The doctor says, "I cant opporate on him.