Tips to fine square root of lengthy numbers in second

Guys, can you give me some good Tips to fine square root of lengthy numbers in second????????????????

[Arun Vats]

There are no Shortcuts to fine square root of lengthy numbers in second; the only thing you need to do is practice more and more.

Here are some tips which will very useful while studying:

Build speed by practicing problems
Learn tricks to do lengthy calculations
Make good approximations.
Always remember the formulae
Revise, revise, revise!

Some good Mathematics books: