Recently one of the regular QuickerMaths visitor stumbled upon a website that claims to read your mind using some sort of math trick. He got perplexed that how is it possible? How come every time it gives correct answer? He asked me if I could unravel the secret. Fortunately I could. I am sure many of you would be able expose the trick behind this mind reading game. At least all of you should try.

The website is called Regifting Robin. It asks you to pick any 2 digit number and then subtract the digits of the number from your two digit number. Say you pick 37. Then you do 37 – 3 – 7 = 27.

On the next screen, you are given grid of numbers, numbered 1 – 99. You are instructed to find the box with your number (in this case, 27) and read the name of the gift inside the box. Click next and Robin tells you the gift you selected. You can check this works every time.

### Try it yourself

So how does it work?

People who want to learn many such mind reading tricks can refer to the book – Easy Mind-Reading Tricks by Robert Mandelberg and Ferruccio Sardella.

### Solution

Mr. Sagar has explained the secret behind this mind reading trick beautifully in the comment below. I am just reproducing the comment below for everyone’s convenience –

“This Mind Reader will use mathematics to create the illusion that this technique is reading your mind. A person select a number AB (where A will be the very first digit and B the 2nd digit). The end result of your calculation are going to be:
(10A +B) – (A + B) = 9A.
Which means that, what ever B you select, your answer could only be one of the following 9 numbers (given A between 1 and 9): 9, 18, 27, 36, 45, 54, 63, 72, 81. When you look at the table of numbers and symbols in the mind reader, you will see that the symbols change each and every round in order to confuse you, however in any given round, the symbol is always exactly the same for these 9 numbers. Your computation actually provides a ultimate result associated with the unique symbol assigned to the 9 possible solutions.”

#### Vineet Patawari

Hi, I'm Vineet Patawari. I fell in love with numbers after being scared of them for quite some time. Now, I'm here to make you feel comfortable with numbers and help you get rid of Math Phobia!

## 18 thoughts to “Mind Reading Trick”

1. Mind reading games are usually associated with the theory of the mind where people relate with thought of other people around them. With these skills developed, those so called “magicians, mentalists or mind readers” are able to read through a person’s thoughts by many ways.

2. Sunil Shrivastav says:

Awesome work… keep the real inheritance of our culture… vedic math is really very good….

3. narayanan r s says:

great work behind and its a multiple of 9

4. I think its a multple of 9 and the list changes every time , whatever number you choose it will be multiple of 9. 😀

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1. I will be happy if u help in spreading the awareness about vedic maths!!

1. Kalpan Shah says:

My self Kalpan Shah & I am going to teach Ve

6. Manish says:

nice one

7. When i tried to find out the solution it seemed next to impossible and eventually i gave up. I read the trick later and found that the trick was so simple only i needed to concentrate on a solution and i was supposed to ask myself that how he could do it? The answer was hidden in my number only. The only thing was i couldn`t explore it properly. We hope to see such kind of stuffs over and over again.
Thank You.

8. Ankush says:

I already knew this , seen a similar mind game before

9. Ankush says:

Its a multple of 9 and the list changes every time , whatever number you choose it will be multiple of 9

10. sagar says:

This Mind Reader will use mathematics to create the illusion that this technique is reading your mind. A person select a number AB (where A will be the very first digit and B the 2nd digit). The end result of your calculation are going to be:
(10A +B) – (A + B) = 9A.
Which means that, what ever B you select, your answer could only be one of the following 9 numbers (given A between 1 and 9): 9, 18, 27, 36, 45, 54, 63, 72, 81. When you look at the table of numbers and symbols in the mind reader, you will see that the symbols change each and every round in order to confuse you, however in any given round, the symbol is always exactly the same for these 9 numbers. Your computation actually provides a ultimate result associated with the unique symbol assigned to the 9 possible solutions.

1. shna says:

thats true…………cant v ever find a real mind reader?good for u to notice it

11. deepak says:

Sorry, it’s a multiple of 9

12. deepak says:

Its multiple of 3

13. hey,

Really how amazing it works,