Question

What could be the possible ones digits of the square root of the number 7921

Answer 1

Step-by-step explanation:

a number is a perfect square (or a square number) if its square root is an integer; that is to say, it is the product of an integer with itself. Here, the square root of 7921 is 89. Therefore, the square root of 7921 is an integer, and as a consequence 7921 is a perfect square.