you can actually let people think you are incredibly a genius by knowing these tricks.

1. Multiplying by 11(Eleven)
It is really easy to multiply any two digits by 11 if you know one little secret.
Let's take number 43 X 11
� 4 + 3 = 7, now put 7 in between 4 and 3 = 473.
� 43 X 11 = 473
Oh! That looks pretty easy, but let's take 78.
� 78 X 11
7 + 8 = 15, if you put 15 in between 7 and 8 = 7158 you are wrong! You have to do it like this �
[img]https://2.bp..com/-KHS_qu6zeN8/XLRDM_x8yzI/AAAAAAAACWA/_dNX8-E0f7Y-8US1EYa9r_e3e3jZPC0JQCK4BGAYYCw/s1600/Screenshot_2019-04-11_072324.jpg[/img]
You will put the second digit (5) in between 7 and 8 which is 758, then add the first digit (1) plus 7. Then we have 858.
� 78 X 11 = 858
[img]https://2.bp..com/-U5VLpjaCSXA/XLRDSGgjSGI/AAAAAAAACWI/RibGd2xb9KwCcwjJzcjPbpPx6aD0KHnhgCK4BGAYYCw/s1600/Screenshot_2019-04-11_072331.jpg[/img]
2. Instant square of numbers that ends with number 5 e.g 15, 25, 35, 75, 85, 115, 205 etcetera.

Let's take 65
� 65 X 65 (instant square).
First you will multiply 6 X 7 that is, the same number 6 X (6 + 1) = 42, then we put "25" at the end of 42 which is 4225 and that's the answer.
65 X 65 = 4225

� Quite simple! But unfortunately, it only works with numbers that end with 5.

3. Fibonacci Sequence (Also called the Fibonacci number)
E.g.
1+1=2
1+2=3
2+3=5
3+5=8
5+8=13
8+13=21(Fibonacci sequence)
So,ask your friend to write two different numbers, the bigger on top of the smaller one, now sum up the numbers.
� we will use 10 and 5
[img]https://1.bp..com/-vEimnux0tVY/XLRDXONaYCI/AAAAAAAACWQ/7vM_sR7dNXI2BrxSlTIbEZaP1PU3H9gHACK4BGAYYCw/s1600/Screenshot_2019-04-11_073457.jpg[/img]
10
+ 5
15
20
35
55
90(seventh digit)
145
235
380
You will ask your friend to add up all the ten numbers, then you will come up with the sum of all the ten numbers before your friend finishes with the addition of those numbers which is 990. Let your friend confirm the answer if you were correct, because you genius add up ten numbers within a couple of seconds. And here is the secret!
� All you have to do is to multiply the seventh by 11 which is 90 X 11 and you already know how to do (from #1).
Let me revise it,
� 90 X 11
9 + 0 = 9, put 9 in between 9 and 0, then we have 990 which is 90 X 11 = 990.

4. Guessing the number.
Take a sheet of paper.
Write any 6 digits number.

1 5 6 2 8 9 - written by you.
2 5 4 7 2 1 - ask your friend to
write any 6 digits
number.
7 4 5 2 7 8 -Written by you.
6 5 4 3 2 7 -someone else will write.
3 4 5 6 7 2 - you will write the last
number.
Now, ask another person to sum up all the for numbers.
= 2 1 5 6 2 8 7
When the result is written down, you will take out the sheet you've written the answers from the start from your pocket. They will all think you have one power to see the future.
� Now, let me teach you how to know the answer before the game starts, which is simple!
So, what's the secret!!!
[img]https://4.bp..com/-xfMtWIQH_Ko/XLRDh_zahQI/AAAAAAAACWk/EqkmgPtJokINvoTHnOp7nwT9aM4YiYhIACK4BGAYYCw/s1600/Screenshot_2019-04-11_080031.jpg[/img]
1st digits - 1 5 6 2 8 9 you
2nd digits - 2 5 4 7 2 1 (your friend)
3rd digits - 7 4 5 2 7 8 you
4th digits - 6 5 4 3 2 7 (your friend)
5th digits - 3 4 5 6 7 2 you

� let's take a look at the 2nd and the 3rd numbers. The second is written by your friend and the third by you, remember!

Add 2nd and 3rd numbers
(254721 + 745278)= 9 9 9 9 9 9, that means you have to write the number added to the 2 5 4 7 2 1 (written by your friend) that will equal to 9 9 9 9 9 9, the same have to happen with the last two numbers i.e the fourth and the fifth numbers must be 9 9 9 9 9 9, that means you must write a number that when added to the fourth numbers written by your friend will equal 9 9 9 9 9 9.
� i.e 9 9 9 9 9 9 X 2 = 1 9 9 9 9 9 8
So, before the trick you have to choose the second digit numbers bigger than 1 9 9 9 9 9 8
I.e 1 9 9 9 9 9 8 < 2 1 5 6 2 8 7
Write 2 1 5 6 2 8 7on a piece of paper and put it in your pocket. Don't forget, the first digit should be the result if we subtract
� 2156287 - 1999998 = 1 5 6 2 8 9

i.e 2 1 5 6 8 7 - the over all answer.
1 5 6 2 8 9 - the first number
written by you.

� 156289 + 1999998 = 2166287
So, memorize your chosen first numbers correctly.
You have to calculate the first digit and the over all answer before the game starts because this will determine the outcome your magic.

� The sum of the five numbers must be equal to the one you have in your pocket.

Hope you enjoyed these tricks? Drop comments below for any difficulty.

SOURCE: https://www.mindmingers.com/2019/04/incredible-mathematics-tricks-that-look.html?m=1

Why not use a calculator instead?
Time is too precious to be expended on things like these.

alonzoiv:
Why not use a calculator instead?
Time is too precious to be expended on things like these.

Thats why you should patiently read the article. You need to find out the content first.