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 Author Topic: Maths Magic - Fun with mathematics  (Read 2322 times) 0 Members and 1 Guest are viewing this topic.
nepali
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 « on: March 13, 2008, 12:34:36 PM »

8    1    6
3    5    7
4    9    2

This square has interesting property that every row and diagonal add up to 15, and although you can change it by rotating or reflecting it, the basic arrangement is unique. Unfortunately it is too well known to rate as a good bit of magic, but there are variants which are less well known and therefore more magical.

This one is one of the most ancient of mathematical curiosities is the so-called magic square.
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nepali
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 « Reply #1 on: March 13, 2008, 12:35:36 PM »

I like this simple square:

11    66    98    89
99    88    16    61
86    91    69    18
68    19    81    96

In the square, every row, column and diagonal adds to 264. If you study it a bit more closely you should be able to see the simple principle behind it. However, what makes it particularly magical is that if you turn the square upside down, it becomes what appears to be a different magic square, but with the same magic total.

(In fact all of the numbers on the original square are simply mapped onto new positions in the inverted square, though it takes a while to figure out what the rule is for which goes where.)
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nepali
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 « Reply #2 on: March 13, 2008, 12:36:43 PM »

Recurring Number Magic

Effect
You write down the following 8 digit number on a piece of paper:

1 2 3 4 5 6 7 9

Then ask a friend to circle one of the digits. Say that they circle number 7.

You then ask your friend to multiply the 8 digit number by 63, and magically the result ends up being:

1 2 3 4 5 6 7 9
x                     6 3
7 7 7 7 7 7 7 7 7

with the answer as a row of the chosen number 7.

Secret ??
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nepali
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 « Reply #3 on: March 13, 2008, 12:38:26 PM »

The Secret of 7 trick

When your friend circles a number, you need to multiply the chosen number by 9 in your head - if 3 was chosen you would work out 3 x 9 = 27. Then you need to ask your friend to multiply the 8 digit number by the number you have just worked out. In the case of 3 being chosen you ask your friend to multiply 12345679 by 27 and you magically get the answer 333333333.
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nepali
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 « Reply #4 on: March 13, 2008, 12:38:47 PM »

Another

THE NAME OF THE CARD IS...

Effect
You secretly predict which card will be chosen. Then you ask a friend to randomly select a number and count down that many cards in the deck. At first this card doesn't match your prediction, but after a few comical adjustments, the name of the card mysteriously appears!

Things you need
A deck of playing cards
A calculator
Paper and pencil

Preparing the trick
Put the 10 of Hearts in the eighteenth position down from the top of the deck.

The Secret
Announce that you are going to predict which card will be chosen from the deck. On a piece of paper, write: THE NAME OF THE CARD IS Fold the paper so that your friend doesn't see what you've written and put it aside until later. Ask your friend to:
1. Enter a 3-digit number into the calculator. (The first digit must be larger than the last digit.)     Example: 845
2. Reverse this number and subtract it from the first number. -548 3.

Tell him to count down that many cards in the deck. It will be the 10 of Hearts.
He'll read, "THE NAME OF THE CARD IS".

Say that you were in such a hurry that you forgot to finish your prediction. Then make these adjustments and his card will mysteriously appear!
-cross off the H in THE
-cross off the AME in NAME
-cross off the T in THE
-cross off the CD in CARD
-change the I in IS to a T by crossing the top

leaving THE TEN OF HEARTS
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nepali
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 « Reply #5 on: March 13, 2008, 12:39:21 PM »

The Mysterious Aces

Effect
Three aces will magically appear when the great Mathematical Forces are called.

Things you need
A deck of cards

Preparing the trick
Pick out the aces and any 8. Then count down seven cards and place the 8 with the four aces underneath it. (In other words, the 8 is the eighth card and the aces are 9th, 10th, 11th, and 12th cards down.)

The Secret
Ask a friend for a number between 10 and 20. (Be careful 10 works but 20 does not!) Deal out that number of cards into a pile one at a time. Ask your friend to add the digits of that number. Return that many cards to the top of the deck one card at a time. Turn over the top card and it will be and it will be an ACE. (Very cool!!) Set this Ace aside and put the small pile back on top of the deck. Repeat the trick two more times and get two more aces. Finally, pretend to ask the Lords of Maths for a sign as to where the other ACE is. Pretend that they tell you to turn over the top card. (It will be an Count down that many cards and there will be the final ACE!!! (A quick example...count out 15 cards one at a time... then put six back one at a time...and turn over the top card .... An Ace!!!)
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nepali
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 « Reply #6 on: March 13, 2008, 12:39:48 PM »

Number Card Magic
Make 5 cards the same as these:

Card A 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31
Card B 2 3 6 7 10 11 14 15 18 19 22 23 26 27 30 31
Card C 4 5 6 7 12 13 14 15 20 21 22 23 28 29 30 31
Card D 8 9 10 11 12 13 14 15 24 25 26 27 28 29 30 31
Card E 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31

Get your friend to choose any number from the cards without telling you the number, but to tell you all the cards it appears on. You should be able to quickly say what number was chosen. How?
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nepali
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 « Reply #7 on: March 13, 2008, 12:42:59 PM »

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xsajha
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 « Reply #8 on: April 09, 2008, 03:01:51 PM »

101% From a strictly mathematical viewpoint:

What Equals 100%?

What does it mean to give MORE than 100%?

Ever wonder about those people who say they are

giving more than 100%?

We have all been in situations where someone wants

you to GIVE OVER 100% .

What equals 100% in life?

Here's a little mathematical formula that might help

If:

A B C D E F G H I J K L M N O

P Q R S T U V W X Y Z

Is represented as:

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

16 17 18 19 20 21 22 23 24 25 26.

If:

H-A-R-D-W-O-R- K

8+1+18+4+23+15+18+11 = 98%

And:

K-N-O-W-L-E-D-G-E

11+14+15+23+12+5+4+7+5 = 96%

But:

A-T-T-I-T-U-D-E

1+20+20+9+20+21+4+5 = 100%

THEN,

look how far the love of God will take you:

L-O-V-E-O-F-G-O-D

12+15+22+5+15+6+7+15+4 = 101%

Therefore, one can conclude with

mathematical certainty that:

While Hard Work and Knowledge

will get you close, and Attitude

will get you there,

It's the Love of God that will

put you over the top!

;p
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