serial number feat 3967
TRANSCRIPT
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Serial Number FeatOriginated by Royal V. Heath
Presented by Grey Matters Mental Gym
http://members.cox.net/beagenius/
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Serial Number Feat
In the Serial Number Feat, you ask
someone to take out a bill, and make sure
you dont see the serial number.
You ask for the totals of the 1st and 2nd
digits, the 2nd and 3rd digits, and so on,
up to the 7th and 8th digits. You also askfor the total of the 2nd and 8th digits.
After some figuring on a notepad, you
can give the hidden serial number!
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Serial Number Feat
Requirements
Notepad
Pencil
Spectator
The bill used in the experiment must have
an even number of digits in the serial
number, such as U.S. bills with 8 digits.
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Serial Number Feat
Ask a spectator to remove a bill from
their pocket. As an example, lets say thehidden serial number is 37036914.
Ask for the total of the 1st & 2nd digits,
and write that on the notepad. In ourexample, the answer would be 10 (3+7).
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Serial Number Feat
Ask for the total of the 2nd & 3rd digits,
the 3rd & 4th, and so on up to the total of
the 7th and 8th digits, writing each
answer on the notepad. In our example,
your notepad would now read: 10-7-3-9-15-10-5
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Serial Number Feat
Finally, ask for the total of the 2nd and
8th digits on the bill, and write that
answer on the notepad. Adding this
answer, our example notepad would now
read: 10-7-3-9-15-10-5-11
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Serial Number Feat
Notepad reads: 10-7-3-9-15-10-5-11Add the 2nd, 4th, 6th and 8th totals
together. In our example, we add
7+9+10+11 to get 37. Write that totaldown below the other totals.
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Serial Number Feat
Notepad reads: 10-7-3-9-15-10-5-11
37Next add the 3rd, 5th and 7th digits
together (note that the 1st total isnt
included).In our example, we add3+15+5 to get 23. Write that total beside
the previous total.
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Serial Number Feat
Notepad reads: 10-7-3-9-15-10-5-1137 23
Using the two totals on the second line,
subtract the 2nd from the 1st.In ourexample, this is 37-23, giving us 14.
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Serial Number Feat
Notepad reads: 10-7-3-9-15-10-5-11
37 - 23 = 14
Divide this answer by 2, which will give
the 2nd digit of the serial number. In our
example, 14/2=7, so we know that thesecond digit of the serial number is 7.
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Serial Number Feat
Notepad reads: 10-7-3-9-15-10-5-11
37 - 23 = 14 . . . . 14/2=7
Subtract the 2nd digit (7 in our example)
from the 1st total (10 in our example) to
get the 1st digit of the serial number. Inour example, we perform 10-7 to get 3.
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Serial Number Feat
Notepad reads: 10-7-3-9-15-10-5-11
37 - 23 = 14 . . . . 14/2=737
The rest of the digits are worked out in a
similar manner.In our example, the totalof the 2nd and 3rd digits is 7, giving us 7-
7=0 as the third digit.
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Serial Number Feat
Notepad reads: 10-7-3-9-15-10-5-11
37 - 23 = 14 . . . . 14/2=7
370
Continue working through the rest of the
totals one by one, ignoring the final total
(11, in our example, which is the total ofthe 2nd and 8th digits). Try and work out
the remaining digits of our example
before continuing.
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Serial Number Feat
Notepad reads: 10-7-3-9-15-10-5-11
37 - 23 = 14 . . . . 14/2=737036914
Once youve worked out each digit, you
now have the serial number (example inboldabove)! Read it off to the spectator
to verify that you are correct.