Archive for the ‘Mentalist Maths’ Category

h1

MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig MathsPig …………………………………………………. with Kerry Cue

April 25, 2015

Mathspig Maths Mystery Box

Helloooo My Little Luvvies,

 

So here are the 10 Maths Mystery Box challenges I’ve put together for you:

1. Maths Mystery Box 1: NOT STUPID

…………………………………………………………..

2. Maths Mystery Box 2: CURIOUS

…………………………………………………………..

3. Maths Mystery Box 3: NERD

…………………………………………………………..

4. Maths Mystery Box 4: FUNNY THAT

…………………………………………………………..

5. Maths Mystery Box 5: FANTASY

…………………………………………………………..

6. Maths Mystery Box 6: WEIRD

…………………………………………………………..

7. Maths Mystery Box 7: PHONES

…………………………………………………………..

8. Maths Mystery Box 8: JUNK FOOD

…………………………………………………………..

9. Maths Mystery Box 9: MUSIC

………………………………………………………….

10. Maths Mystery Box 10: LETHAL

…………………………………………………………..

mathspig bonusAnd the bonus Maths Mystery Box Question:

Sniffer rats have been in the news this week, but:

 When is a sniffer rat better than a sniffer dog?

(Hint: It has to do with a measurement?)

…………………………………………………………..

Isn’t MATHS marvelous? And magical too!

 ……………………………………………………………..

Hoo Roo for now,

  ……………………………………………………………..

MATHSPIG

 
Advertisements
h1

Now You See It. Now You don’t: 1

June 25, 2013

Maths in the Real World

Here is a maths trick. You may have seen it as a circulating e-mail.

I’ll hint at how this works later. Just play for now.

Picture 1

………………………………………………………………

Picture 2

Picture 5

……………………………………………………….

………………………………………………………

……………………………………………………….

……………………………………………………….

………………………………………………………

……………………………………………………….

……………………………………………………….

………………………………………………………

……………………………………………………….

……………………………………………………….

………………………………………………………

……………………………………………………….

……………………………………………………….

………………………………………………………

……………………………………………………….

……………………………………………………….

………………………………………………………

……………………………………………………….

……………………………………………………….

………………………………………………………

……………………………………………………….

Picture 4Picture 3…………………………………………

………………………………………….

………………………………………….

………………………………………….

………………………………………….

………………………………………….

How does this work?

Maths goes wrong in the real world when we ASSUME certain parameters are CONSTANTS when they are VARIABLES.

This is how this trick works. We assume the cards above are constant.

Now look at both sets of cards again …………………

h1

Now You See It. Now You don’t 2

June 25, 2013

Slot machine maths:

a lose lose date with the Pokies

slot machine reels

According to Tom Vanderbilt in The Guardian ( Slot machines: a lose lose situation, 8 JUN 2013)

Once seen as a harmless diversion, hi-tech slot machines now bring in more money than casinos – and their players become addicted three times faster than other gamblers.

 Here’s how the math works:

slot machine 2

In Australia pokie machines must return between

85%

and

90%

of money gambled.

But here is the catch. If you start out with $300 that means, surely, you’ll go home with$255 in your pocket less some for the big payouts.

WRONG! WRONG! WRONG!

According to ex-gambler Tom Cummings you’ll probably go home with

NOTHING!

In his article, Poker machine maths, (ABC, The Drum, 27 MAY 2011) it is not unusual for someone to start with $300 but put $3,000 into the  machine over 4 – 5 hours. 

Here’s the sting. According to the poker machine, $3,000 was gambled, and $300  was kept (by the slot machine). That means that the machine paid out $2,700… which is the 90 per cent return.

That’s one pension cheque gone for the week.

Warren Buffett has called

gambling in general a 

“tax on stupidity”

pickpocket

or a way of fleecing those who don’t do the maths.

h1

Trick 1: The Great MATHoudini

November 30, 2012

.

.

.

.

.

……………………………….

The Great MATHoudini

Requirements: 1 phone book, Great showmanship

Start by handing one member of the class a sealed envelope. It contains a name that you have seen in your mathematical mind.

All will be revealed at the end of the performance.

Ask one student to write a 3-digit number on the board.

Ask a second student to turn this number around and subtract the smallest number from the largest number.

Ask a third student to turn that number around and add the last two numbers.

Example: N1 = 371.

N2 = 173

N1 – N2 = N3 = 371 – 173 = 198

N4 = 891

N4 – N3 = 891 + 198 = 1089

Give a fourth student a phone book. Ask them to go to page 108 and count down 9 places on the first column and read out the name.

Now open the envelope.

Da! Da!

 

How does it work? The numbers ALWAYS add up to 1089 so you had plenty of time to check out the name int he phone book.

Source: Magic/Menatalism Tips and Tricks

h1

Trick 2: Luck Be a Math Nerd Tonight

November 30, 2012

……………………………………………………………………………………

Luck Be a Math Nerd Tonight

Requirements: 1 die, a fanfare would be nice.

You will find a fanfare here.

Ask a student to roll the die, double the number and add 5.  He can show the class the number, but not you.

Ask the student to multiply this number by 5.

Ask the student to roll the die again and add this number to the total.

Now you can tell them the numbers they rolled.

Example:

N1 = 3

Double: 2N1 = 6

Add 5: 2N1 + 5 = 11

x5:   5(2N1 + 5) = 55

Roll dice:

N2 = 4

Add 4:

55 + 4 = 59

Math Nerd:

Secretly subtracts 25 from this number:

59 – 25 = 34

Da! Da! There are the two numbers rolled.

Source: Magic/Menatalism Tips and Tricks

h1

Trick 3: Maths Swami Knows Your Birthday

November 30, 2012

  .

.

.

………………………………………….

Maths Swami Knows Your Birthday

Requirements: Calculator and spooky demeanor

Imagine your birthday was 24 September 1973.

Written as an American date (not UK or Australia) this would be:

9-24-73.

Give the calculator to a student:

Take birthday month and add 18:

9 + 18 = 27

x 25

27 x 25 = 675

– 333

675 – 333 = 342

x 8

342 x 8 = 2736

– 554

2736 – 554 = 2182

Divide by 2

2182/2 = 1091

Add day of birthday date

1091 + 24 = 1115

x5

1115 x 5 = 5575

+ 692

5575 + 692 = 6267

x 20

6267 x 20 = 125340

Add the last two digits only of your birth year

125340 + 73 = 125413

– 32940

125413 – 32940 = 92473 = 9-24-73

Yes! Yes!

Hint: It probably would be easier to ask them for their birthday. Ha! But Maths Swami’s are mysterious beings.

You will find a video link on Youtube

h1

Trick 4: Madame Mathematique Clairvoyant

November 30, 2012

.

.

.

.

…………………………………………..

Madame Mathematique Clairvoyant

Requirements: Spooky music and spooky look.

You will find some spooky music here.

Ask a student to write down two 5-digit numbers. You rapidly write a 5-digit number underneath.

Ask another student to write another 5-digit number. You write another 5-digit number quickly.

Stand back.

And instantly write the answer.

Example:

N1 = 97413

N2 = 28619

N3 = 71380  (Each digit in N3 must add up to 9 with digits above)

N4 = 64231

N5 = 35768  (Each digit in N5 must add up to 9 with digits above)

Now you will instantly write down the sum of these five numbers as

297411

Da! DA!

The trick is to subtract 2 from N1 and put it in front:

N1 = 97413

N1 -2 = 97411

Sum of 5 numbers = 297411

Hint: Get as many students to add up the five 5-digit numbers on a calculator. You will beat them, but you will also need many answers as a number of students will key incorrect numbers.

Magic Chat