# The Whispering Jokers Card Trick

Sometimes called *Prior Committment*, but as *Whispering Jokers*,
it fooled Penn and Teller
(once), but can be done by anyone!

## A deck of 52 cards, plus 2 jokers

1 2 3 4 5
1234|678901234|678901234|678901234|678901234|6789012
.................................................... A B

## Jokers A and B at positions P and Q, say 10 and 29

This splits the deck into "upper", "middle", and "lower" portions,
labelled "u", "m", and "l".

1 2 3 4 5
1234|678901234|678901234|678901234|678901234|678901234
uuuuuuuuuAmmmmmmmmmmmmmmmmmmBlllllllllllllllllllllllll
(9) P=10 (18) Q=29 (25)

## 2 cuts, at C and D, say 13 and +24, revealing cards X and Y

1 2 3 4 5
1234|678901234|678901234|678901234|678901234|678901234
uuuuuuuuuAmmX A@P=10, X@C=13
mmmmmmmmmmmmmmmBlllllllY B@Q-C=16, Y@D=24
lllllllllllllllll (54-D-C)=17 remain

## dupe 1's pile on top of bottom

1 2 3 4 5
1234|678901234|678901234|678901234|678901234|678901234
uuuuuuuuuAmmXlllllllllllllllll A@P=10, X@C=13,
mmmmmmmmmmmmmmmBlllllllY B@Q-C=16, Y@D=24

## dupe 2's pile on top of the lot

1 2 3 4 5
1234|678901234|678901234|678901234|678901234|678901234
mmmmmmmmmmmmmmmBlllllllYuuuuuuuuuAmmXlllllllllllllllll
A@D+P=34, X@D+C=37, B@Q-C=16, Y@D=24

## Split on, and remove jokers

1 2 3 4 5
1234|678901234|678901234|678901234|678901234|678901234
mmmmmmmmmmmmmmm length=Q-C-1
lllllllYuuuuuuuuu Y@D+C-Q=8, length=D+P-Q+C-1=17
mmXlllllllllllllllll X@D+C-D-P=C-P=3, length=54-D-P=20

## Bottom on top of middle

1 2 3 4 5
1234|678901234|678901234|678901234|678901234|678901234
mmmmmmmmmmmmmmm length Q-C-1
mmXllllllllllllllllllllllllYuuuuuuuuu X@C-P=3, Y@54-D-P+D+C-Q=54-P+C-Q=28

## Top on top

1 2 3 4 5
1234|678901234|678901234|678901234|678901234|678901234
mmmmmmmmmmmmmmmmmXllllllllllllllllllllllllYuuuuuuuuu
X@C-P+Q-C-1=Q-P-1=18, Y@54-P+C-Q+Q-C-1=54-P-1=43

## Conclusion

Position of X and Y are independent of C and D, only on Q and P.
So write the numbers (P-Q-1) and (54-P-1) on the two jokers. In our
example, that's 18 and 43. Note that 43=25+18, and see the first
diagram describing the placement of the jokers.

## Better explanation in video form

Singingbanana nails it here.
The simpler colour-only explanation doesn't tell you what numbers to put on the cards,
but makes the mechanics of the trick much easier to understand.

Another hastily constructed page by Phil Carmody

Home / tricks / Whispering Jokers