## Archive for the ‘10 Mentalist Maths Tricks’ Category

## Trick 1: The Great MATHoudini

September 18, 2018## Trick 2: The Math Teacher Knows

August 4, 2018……………………………………………………………………………………

# The Math Teacher Knows Everything

### 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:

### N_{1} = 3

### Double: 2N_{1 }= 6

### Add 5: 2N_{1} + 5 = 11

### x5: 5(2N_{1} + 5) = 55

### Roll dice:

### N_{2} = 4

### Add 4:

### 55 + 4 = 59

### The Math Teacher Knows:

### Secretly subtracts 25 from this number:

### 59 – 25 = 34

### Da! Da! There are the two numbers rolled.

### Source: Magic/Menatalism Tips and Tricks

## Trick 3: Maths Swami Knows Your Age and Foot Size

July 9, 2018# Maths Swami 1: A Magic No.

# Maths Swami 2: I Know 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

## Trick 4: How to be a Mathematical Clairvoyant

June 22, 2018# How to be a Mathematical Clairvoyant

### Requirements: Spooky music and spooky look.

### You will find some spooky music here.

**Tell your students you will beat them adding up 5 x 5 digit numbers in your head when they are using calculators.**

# Method:

### 1. Ask a student to write down 2 x 5-digit numbers on the board.

### 2. You rapidly write a 5-digit number underneath.

### 3. Ask another student to write another 5-digit number.

### 4. You write another 5-digit number quickly.

### 5. You have 5 by 5 digit numbers. Say ‘Go’. You instantly write down the answer.

### Stand back.

# This is how it works:

### N_{1 }= 97413

### N_{2} = 28619

### N_{3} = 71380 (Each digit in N_{3} that you write down must add up to 9 with digits in No. above)

### N_{4} = 64231

### N_{5} = 35768 (Once again each digit in N_{5} 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 N_{1 }and put it in front:

### N_{1 }= 97413

### N_{1 }-2 = 97411

### Sum of 5 numbers = 297411

# This is why it works:

### Hint: When you get your students to add up the five 5-digit numbers on a calculator you will beat them, but they will also get many different answers as a number of students will key incorrect numbers.

# Magic Chat

## Trick 5: Cool Math Trick

June 4, 2018### Requirements: A Pack of Cards and a willing assistant.

### Take 10 cards from pack including the 10 Diamonds.

### Lay out card in 3 columns in a pattern of 4 down, 2 down, 4 down.

### Put the 10 Diamonds at the top of the left hand column.

### Group students around. You turn your head away and ask a student to point to a card.

### You carry on, think allowed and then ask your assistant to point to cards asking:

### Is it this one?

### No.

### Is it this one?

### No.…………………………………………………………………………………

### When your assistant points to the 10 Diamonds he will show you the position using the diamonds. The cards are laid out on the table in the pattern of the diamonds on the 10 Diamonds.

### Whenever your assistant asks is it this one? You will know.

## See Mentalism Card Trick:

## Trick 6: Freaky Math Medium

May 27, 2018### Write the word carrot inside your math text book. Do not show students.

### When Mathspig was a mathspiglet we used to play this trick. It doesn’t work on everyone, but it works often enough.

### Ask a student to say 15 times 15 fifteen times.

### Then ask them to name a vegetable. Students say carrot 90% (I’m guessing) of the time.

### To make this trick more dramatic send 10 students out of the class before you begin and tell the other half what you are about to do. Students return one at a time. How often do they say ‘carrot’? What % of students say carrot?

## Trick 7: My Math Teacher is Psycho … Psychic!

May 17, 2018## Trick 8: Spooky Maths Magic

May 4, 2018# Spooky Maths Magic

### Requirements; Smart board/data projector.

### This is mental maths, but not hard maths. You can play this video by Marco Frezza directly to the class.

### It may not work on everybody, but it would be very interesting to see how many students are fooled by this spooky magic man.

## Trick 9: Coin Trick. How to throw 10 HEADS in a row!!!!

April 30, 2018### Requirements: A coin for each student & smart board or data projector.

### First ask your students to toss a coin 10 times each.

### Ask each student how many heads in a row they threw.

### Now ask students ‘Do you think it is possible to throw 10 heads in a row?

### It can be done. Here is how you do it.

### Derren Brown is a UK mentalist, magician, hypnotist and maths guru. He’s awesome. He shows audiences how a lack of understanding maths, especially probability, leads to misinterpreting the facts.

### Now play this video to the students:

## Trick 10: A Foolproof Gambling System

April 23, 2018# Math Mentalist Devises Foolproof Gambling System

### Requirements: Smart board/Data Projector

### or Chalk & Talk

### This is the most awesome way to introduce probability.

### Mentalist Derren Brown devises a foolproof gambling system. He sends a girl , Kadisha, the number of a winning horse in race to be run the next day. It wins. He sends her the winning horse and race number 4 more times. She ends up with winnings close to £ 1000 before the final race. Derren convinces her to borrow money for the last bet. She does. She places £4,000 on a horse. Did it win?????

### Watch Part 5 of The System