_:n808f3e8528f44dbd82d09a9ec3aba4fcxb20
<http://schema.org/text>
"Ham this trick up with magician's patter.\nThe \"original number\" could be anything you want---someone's age, or their favorite number--- just ask the crowd for suggestions. This will change the final outcome, so test beforehand."
<https://www.wikihow.com/Do-a-Cool-Mathematical-Mind-Reading-Trick>