Question

How to find the approximate square root of a number?

Answer 1

you take all of the number and add them up. Then take that answer that you just got and divide it by the amount of numbers that you divided with.

Answer 2

Generally, honestly saying, its your decision that how much will you continue your approximation on finding the square root of a number approximately.

For example,
√2 = 1.414 or 1.41 (approx.)
√3 = 1.732 or 1.73 (approx.)