Question

Pls anyone explain this table.. What is this how to do this...
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Answer 1

Hello mate , it shows the possibility of the unit digit of a Number , if it is Squared

Let's take 10 , in which unit digit is 0

Then if we square this no. :- (10)² = 100 , we get 100 and in 100 the unit digit is 0 which is the only possibility for a number having 0 as the unit digit

Now let's take another example , 13 , in which 3 is the unit digit ,

Then if we square this no. :- (13)² = 169

we get 169 in which 9 is the unit digit , but this is not the only possible value for it , we can further

Square 13 as (13²)² in which we get 1 as the unit digit , similarly there are 4 possibilities for the unit digit of a number having 3 as the unit digit ,

And similarly we can find possibilities for other unit digit numbers , such as a Number having 4 or 5 or 6 or 7 or 8 or 9 as its unit digit.

And this is the Explanation .

I hope you understood it now...

Have a nice day ...