Here is a cool math trick for you to impress your friends but too simple for you to understand…

## Trick: “PSYCHO MATH”

Say to a volunteer in the audience, “**Think of a number, anynumber.**” And you should also say, “

**But to make it easy on**

yourself, think of a one-digit or two-digit number.” After you’ve

yourself, think of a one-digit or two-digit number.

reminded your volunteer that there’s no way you could know

her number, ask her to:

**double the number,****add 12,****divide the total by 2,****subtract the original number.****Then say, “Are you now thinking of the number six?”**

Try this one on yourself first and you will see that the sequence

always produces the number 6 no. matter what number is originally selected. Let’s try again…

Say to one of your friends, “**Think of a number, any number.” And you should also say,** “**But this time, think of a two-digit number.**” After you’ve reminded your volunteer that there’s no way you could know her number, again ask her to:

**double the number,****add 12,****divide the total by 2,****subtract the original number.****Then say, “Are you now thinking of the number six?”**

Now let’s see how this mathematic magic trick works.

## MAGIC REVEALED

###### LET’S SEE Why This Trick Works ALL TIME!!!!

This trick is based on **simple algebra**. In fact, these tricks are sometimes used as a way to introduce algebra to students. The **secret number** that your friend has chosen can be represented by the** letter x.**

Here are the functions you performed in the order you performed them:

**x * 2 (double the number)****2x + 12 (then add 12)****(2x + 12) 2 = x + 6 (then divide by 2)****x + 6 – x = 6 (then subtract original number)**

Now lets apply these functions with some examples.

Let’s say my friend Albert is thinking of a no. **‘7’**. Say him to apply the steps of your magic trick:

**7*2 = 14 (Double it!)****14 + 12 = 26 (then****Add 12)****26/2 = 13 (and then Make it half)****13 – 7 = 6 (and finally subtract original number)**

Albert is amazed !!!!! But, Olivia wants to play with me.

Now, Olivia is thinking of a 2-digit no. ‘**18**‘. After applying the above steps of the math magic trick. **Abracadabra no. is ‘6’.**

And, Olivia is impressed !!!!

For more tricks and other mathematical stuff stay tuned to MathCompt !

Reference: Secrets of Mental Math: The Mathemagician’s Guide to Lightning Calculation and Amazing Math Tricks