## Trick 4: Madame Mathematique Clairvoyant

November 30, 2012# .

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# 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:

### N_{1 }= 97413

### N_{2} = 28619

### N_{3} = 71380 (Each digit in N_{3} must add up to 9 with digits above)

### N_{4} = 64231

### N_{5} = 35768 (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

### 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

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