Mentally smarter way to square between 30 to 70

Welcome to this lesson. We will do this mathematical trick with examples, let’s try first example 

Example 1:

Take the square of 52

(52)² =?

Solution:

Step 1:

Take the difference between 50 and 52 which is 2

52 – 50 = 2

Step 2:

Add calculated 2 in 25 which will be 27

Step 3:

Take zero after 27 don’t worry its rule J

Step 4:

Take the double of 2 which is 4

Answer = 2704

Easy should be calculate less than 5 sec

Example 2:

Take the square of 62

(62)² =?

Step 1:

Take the difference between 62 and 50 which is 12

Step 2:

Add 12 in 25 we will get 37

Step 3:

 Take two times calculated 12 which is 144

Step 4:

Here you don’t need to confuse just add 1 of 144 in 7 of 37 which will become 38

Answer = 3,844 Simple and easiest way to calculate Squares

Example 3:

Take the square of 45 in 5 second

(45)² =?

Solution:

Step 1:

Take the difference between 50 and 45 which is minus - 5

 Step 2:

We got minus 5 so we will minus it from 25 and we will get 20

Step 3:

Take the double of -5 which is 25

Answer = 2,025

Good luck for next time J

Mentally calculation of 21435 *11 in 5 second

Hello everybody while maybe you think it’s impossible well I am going to possible it and you will really enjoy it.

Step 1:

Take the first digit as is it which is 2

Result: 2

Step 2:

Now just add 2 and 1 which result is 3 and write this 3 after 2

Result: 23

Step 3:

Add future second and third digits which are 1 and 4 which result is 5

Result: 235

Step 4:

Add future third and forth digits, result will be 7

Result: 2,357

Add last future forth and fifth digits and result will be 8

Final result will be 23578 and take last digit as is it so our final answer is 235,785