What you need:
1.A deck of playing cards(52) NO jokers.
2.A willing volunteer.
THE TENTH CARD
Before your volunteer arrives make sure that you know the tenth card from the top,in this case the ten of hearts.
Now put the ten cards back in place, we will begin with the volunteer in the next step.
when your volunteer arrives,tell him/her to think of a number between 10 and 20.
I cannot take anymore pictures as my camera has stopped working.
ask the volunteer to deal out the amount of cards the he/she has thought of.
then, take the two digits of the number and add them together.
In this case 14 1+4=5.
take the answer and deal out the that number of cards from the top of the smaller pile.
Finally tell the volunteer to pick up the top card and tell them what it is,or draw it or something.
this is my first instructable so I hope I didn't do too bad.
enjoy and remember practice makes perfect.