If the square root of a number is an integer, the number is called a perfect square. one example of a perfect square is
a.) 50 or b.) 81
81 is the perfect square because 9*9=81
To determine if a number is a perfect square, you need to find its square root and check if the result is an integer. Let's do this for the given options:
a.) To find the square root of 50, you can use a calculator or a mathematical method. The square root of 50 is approximately 7.071. Since this is not an integer, 50 is not a perfect square.
b.) To find the square root of 81, you can again use a calculator or a mathematical method. The square root of 81 is exactly 9. Since 9 is an integer, 81 is a perfect square.
So, the correct answer is b.) 81.