Square root of 16 is 4 and 25 is 5. Hence, the square root of 20 obviously lies between 4 and 5. The factors of 20 are 5x2x2 which gives the square root value of 4.47214

Square root of 16 is 4 and 25 is 5. Hence, the square root of 20 obviously lies between 4 and 5. The factors of 20 are 5x2x2 which gives the square root value of 4.47214

The nearest previous perfect square is 16 and the nearest next perfect square is 25 .