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October 11, 2015

Trick to Find Square of a Number Ending with 5

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Hai friends, SREE here.... its the first time that i am going to share something with you....

Here i am going to tell you a simple trick to find the square of a number ending with 5.
I hope it would be helpful for you....all the best...

Lets start.....

We know 52=25

How can we find (15)2?
Step 1 : 52=25 this 25 is the last two digit of our answer
Step 2 : the remaining number is 1.. now find the next number of 1 from the number system, its 2
          Now 2×1=2; its the first number of our answer..
       Step 3: answer is 225 simple!!
        Got it??    
                                                                          
Now how to find (25)2 ?
Step 1 : 52=25
Step 2 : now we have 3 after 2
             3×2=6
Step 3 : answer 625!!

(55)2 ?
Step 1: 52=25
Step 2 : 5×6=30
Step 3 : answer 3025
Hope you got the method......

Now lets check this method in 3 digit number

How to find (215)2??
Step 1 : 52=25
Step 2 : 21×22=462
Step 3 : answer=46225

Wow!!! It really works....

(725)2 ?
Step 1: 52=25
Step 2 : 72×73=5256
Step 3 : answer 525625!

Hope you understand the method.... we can find square of any number ending with 5 by this method....

Thank you guys thanks for reading!!

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