Question

how I will find square root by shortcut as second method is tooo time gaining.. it took so much time to do .....plz tell​

Answer 1

Yes, it is true that second method is too time gaining.

You can solve faster by approximate estimation .

For example, for 5 you can see that it will be less than 3 but more than 2.

We also know that 25x25=625.

Which means 2.5x2.5=6.25

So it will be less than 2.5

So it will be approximately 2.2