Hello!

Please insert a number for the mind reading trick!

Explanation To "Mind Reading" trick

Have you ever heard the trick, or something like it:

Have a secret number in your head. Multiply by 2. Add 9. Subtract 3. Divide by 2. Subtract you original number... and Boom! You have 3.

Well, how does this work?  

 

Say your secret number is x.

When you multiply by 2, it becomes 2x.

When you add 9, it becomes 2x + 9.

When you subtract 3, it becomes 2x + 6.

When you divide by 2, it becomes 1x + 3.

Subtract x? 3! 

 

More number tricks to impress people with!

 

1. The 4 trick

Take number

Multiply by 2

Add 12

Subtract 4

Divide by 2

Subtract original number

The answer is 4! 

 

2. The 7 trick

Take number

Multiply by 2

Add 9

Add original number

Divide by 3

Add 4

Subtract original number

The answer is 7! 

 

3. The 5 trick (This one's different)

Take number

Multiply by 2

Multiply by 5

Ask for product

Take away last digit...

You now have their original number! 

 

4. Make your own!

Now that you know how they work, you can make your own trick!