Calculate square of any numbers that end in 5 within five seconds

 Can you calculate the square of 95 without using a calculator? You might answer I can but it is quite hard to calculate.

I will show you the best method to calculate the square without using a calculator. Trust me it does not take more than five seconds to calculate.

Let's see some examples :

15=    225

25=    625

35=    1225

Did you observe the common things in the above examples. 

1. We can see 25 at the end of every result

2. Rest of the number can be calculated by this method.

    Let's take an example of 45

     45x45= __ __ __ __

The last two digits will be 25 (see no.1 above).  For the front two digits, use this formula:

(first digit) x(first digit+1)

Here, in 45 first digit is 4. So, by using the formula our result will be 4x(4+1) = 20

Finally square of 45 will be 2025

Using the same method square of 55= (5)x (5+1)     25

                                                             5x6                25

                                                              3025   

Now calculate the square of 95 using the same method. How effective is this method? Let me know in the comment section below.

For more tricks watch my youtube channel.