Transcript Math Magic.ppt - GK

Magician
or
Math-a-magician?
Math Magic
Math Magic – Trick #1
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Pick a number… any number! (keep it
a secret though)
Add 1 to that number
Multiply by 3
Subtract your ‘secret’ number
Add 5
Divide by 2
Subtract your secret number
Math Magic – Trick #1
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Now map the digit you got to a letter in
the alphabet.
For example:
A =1
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B=2
C=3
D=4
Pick a name of a country in Europe
that starts with that letter.
Countries in Europe
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Albania
Andorra
Austria
Belarus
Belgium
Bosnia and
Herzegovina
Bulgaria
Croatia
Cyprus
Czech
Republic
Denmark
Estonia
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Finland
France
Germany
Greece
Hungary
Iceland
Ireland
Italy
Latvia
Liechtenstein
Lithuania
Luxembourg
Macedonia
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Malta
Moldova
Monaco
Netherlands
Norway
Poland
Portugal
Romania
Russia
San Marino
Serbia and
Montenegro
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Slovakia
(Slovak
Republic)
Slovenia
Spain
Sweden
Switzerland
Turkey
Ukraine
United
Kingdom
Vatican City
Math Magic – Trick #1
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Take the second letter in the country's
name, and pick and animal that starts
with that letter.
Think of the color of that animal.
The Magic number 8
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Write down your phone number,
followed by the number 8.
Multiply your phone number by 8 and
write the answer down next to the 8
after your phone number.
Add all the single digits together until
you only have a single digit left. What
is it?
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Example: 12345…  1+2+3+4+5+…=?
General MacArthur's # Game
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Write down the number of the month
you were born in
Double it
Add 5
Multiply by 50
Add in your age
Subtract 365
What is your number?
Any Questions? 