Math-magic Show

MATH-MAGIC SHOW

A Few Instructions Some tricks directed to the audience Most will involve one or more assistants A random method for selection Your applause will be my indicator Card trick vocabulary: to “square a deck” And please turn your cell/smartphones off

A few warm-ups to…

check if you are stilldigesting your lunch

Octagon Magic: Spatial Sense

The audience

Some of you are still digesting…

We need another warm-up

This Time: Number Sense

1000

The audience

40

1000

30

1000

20

1000

10

…equals what?

Let’s look more closely…1000

401000

301000

201000

10????

YES!!!1000

401000

301000

201000

104100

You’re still not ready for the show

But you’re still having fun, right?

One More Spatial Sense Warm-Up

1 2 3 4 5 6 7 8 9 10

Bookworm ProblemA 10-volume encyclopedia sits on a shelf. Each

volume is 4 cm thick. Suppose a book-worm starts at the front cover of Volume 1 and eats his way in a straight, horizontal line to the back cover of Volume 10.

How far does the book-worm travel?

1 2 3 4 5 6 7 8 9 10

Que distancia viaja/recorre?

Last One: But you have to be quick!

One die – Two dice

One domino – Two dominoes

Very good !

Magic Domino Card

I will guess your number1 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 27 28 29 30

1 assistant

Pick a number, write it down, show it to the audience, then place the board face down

Do you see the number here?

20 21 22 23 28 29 3016 17 18 1924 25 26 27

YES or NO?

What about here?

12 13 14 15 8 9 10 11 28 29 30 24 25 26 27

YES or NO?

And here?

12 13 14 15 4 5 6 7 28 29 30 20 21 22 23

YES or NO?

Here?

10 11 14 15 2 3 6 7 26 27 30 18 19 22 23

YES or NO?

And finally, here?

9 11 13 15 25 27 29 1 3 5 7 17 19 21 23

YES or NO?

Calendar Magic 1 assistant

The Flying Card1 assistant

Ring PuzzlesThe audience

I will halve what you have

1 assistant

I will guess your Numbers!

Pick a whole number between 100 and 300It can’t be 100 and it can’t be 300

3 assistants

Secret Move

13 identical objects

2 assistants

Magic Touch…

The Magic Rope

Thank you very much!

MonicaNeagoy@earthlink.net

An Encore?

THANK YOU VERY MUCH! GRACIAS

12. Finale: Double MagicThe mathematician’s way then…The magician’s way

Spades Hearts Diamonds Clubs

I will halve what you have

1 assistant

Magical Twins (Tweelingen)

1 vrijwilliger

I will predict your sum

Begin by placing digits 1, 2, 3, 4, 5, 6, 7, 8, and 9 in any nine cells, in

any order Then we will add three more

digits

Ik dank u weer van hartevoor uw aandacht en deelname

MonicaNeagoy@earthlink.net

Quick test to check if you are still awake…

1000

40

1000

30

1000

20

1000

10

equals?

Let’s look more closely…1000

401000

301000

201000

10????

1000 40

100030

100020

100010

4100!

IK DANK U VEER VAN HARTE VOOR UW

AANDACHT EN DEELNAME

MonicaNeagoy@earthlink.net

Bookworm Problem

1 2 3 4 5 6 7 8 9 10

Bookworm ProblemA 10-volume encyclopedia sits on a shelf. Each

volume is 5 cm thick. Suppose a book-worm starts at the front cover of volume 1 and eats his way in a straight, horizontal line to the back cover of volume 10.

Une encyclopédie à 10 volumes est sur une étagère. Chaque volume a une épaisseur de 5 cm. On suppose qu’un petit ver commence à la couverture du volume 1 et parcourt une ligne droite et horizontale jusqu’au dos de la couverture du volume 10.

Bookworm Problem1 2 3 4 5 6 7 8 9 10

How far does the book-worm travel?Quelle distance parcourt le petit ver?

Bilingual Card Trick

0ne Two Three Four Five Six Seven Eight Nine Ten

Domino Magic

Qu’est-ce que c’est?

De 100 a 300

I will read your mind

The Magic Cut

I will predict your numbersUne feuille de papier s’il vous plait …et

un moment de silence

1 2 3 456 7 8 91011 12 13 14 1516 17 18 19 2021 22 23 24 25

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

Ik dank u van harte voor uw aandacht en deelname

Un dernier tour?

Magic SquareA B C D

C- D+ A- B+

D+ C+ B- A-

B A-- D++

C

Do As I Do1 vrijwilliger

5. Bewitched Addition4 vrijwilligers

3748

1564

7986

5296

8176

3840 different possible permutations (10 x 8 x 6 x 4 x 2)

Bewitched Addition4 vrijwilligers

3748

1564

7986

5296

8176

Once final permutation is chosen, place number strips close together to form four 5-digit numbers

4. Parallel Thinking:21st-century telepathy

Lambrecht + 4 vrijwilligers

Stage assistance to escort Lambrecht, then me, outside Atrium

7. 3-Object Divination1 vrijwilliger

Blindfolding assistance please

9. Poker Magic5 vrijwilligers