How to find a Square root of a number?

The first method is inter-related to this one. This method is applicable only for perfect squares. You have to follow Three simple steps. 1.Find the range2.Check the Unit Digit.3.Find the square of number ending with 5 in the particular range and fix thenumber. a)What is the square root of 484?Step 1 We all know 202 = 400. Also we know 302 = 900. So our number lies between 20 and 30. Step 2 The unit digit is 4. So the unit digit of square root can be either 2 or 8. The number can be either 22 or 28. Step 3 Between 20 and 30, we can easily find the square of 25 using the first method. 252 = (2 x 3)25 = 625 484 is less than 25. So Answer is 22. b)What is the square root of 9801?Range – 90 to 100. Square of 95 = (9 x 10) 25 = 9025. Answer can be either 91 or 99. (Based on Unit Digit) 9025 is less than 9801. So 99 is the Answer