Math tricks Square of 5 series
Hey all, Welcome to my blog today I am going to write about the simple math calculation which we use often in our life. It is about calculating the square of the 5 ending series.
For example, see the below image we are going to find a square of
We have to split the number without the last digit 5. Then we have to make that 5 as 25.
The front digit here 2 is increased by 1 and multiplied by the actual number which is 2 here. Hence we get 6 and 25.
hence we get the required answer
The front digit here 12 is increased by 1 and multiplied by the actual number which is 12 here. Hence we get 156 and 25.
hence we get the required answer
YOU CAN TRY WITH DIFFERENT NUMBERS AND GET THE CORRECT RESULT
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Cool I didn't know that!!
In fact this is true for every number that has 5 as a last digit.
Look
100 times n(n+1) doesn't change the last 2 digits that are 25!!
And this works only with this kind of number... Cool!!