




Shuffle
the deck. That way your victim—oops, your friend—knows
you haven't done anything weird to the deck of cards.


Ask
your friend to choose any card from 1 (ace) to 9, but not a
10, jack, queen, or king. Tell them not to show it to you, but
to memorize the number on it.

Tell
your friend to put his or her card on the table, face down.

Now
you take a card from the shuffled deck. Choose a card with a
number from 1 (ace) to 9. Don't choose a 10, a jack, a queen,
or a king. Don't show the card to your friend.


Memorize
the number on the card, then lay the card face down on the table
on the right side of your friend’s card. Be sure that your
card is to the right of your friend’s card.

Now
comes the "magic" part. Give your friend the paper
and pencil so that he or she can do some math. Now tell your
friend to do the following things—without showing you the
answers:




What
you tell your friend to do: 

Example: 


Suppose
they have the 3 of hearts: 
Double
the value of the card. 

3
* 2 = 6 
Add
2 to that number. 

6
+ 2 = 8 
Multiply
the result by 5. 

8
* 5 = 40 


So
far, your friend has been doing all the math. In this step,
you have to do a little math in your head. Take the number of
the card you chose. (You remember what it is, don't you?) Then
do the following:



What
you do: 

Example: 


Suppose
your number is 8 
Subtract
the number of your card from 10. 

10
 8 = 2 


Now
it’s your friend’s turn again.



What
you tell your friend to do: 

Example 
Tell
your friend your answer from Step 7.
Have your friend subtract that from the number he
or she got after doing all the math in Step 6. 

40
 2 = 38 
Ask
your friend to tell you what number he or she got
after doing all that math. 

Our
friend said 38 


Here’s
the magic part. Flip over your friend's card on the table, and
then your own. There will be the two digits of the number your
friend said. Enjoy the shocked look on your friend's face!




But
wait! Suppose your friend came up with a different number. Mutter
something like, "I know the magic worked—so let’s
check your math." Check the math—and you will get
the number that’s on the cards.

