Final answer:
A square number is a number that is the result of multiplying an integer by itself. To check if a number is a square number, we can take its square root and see if it is an integer. Out of the given numbers, only 36 is a square number.
Step-by-step explanation:
A square number is a number that is the result of multiplying an integer by itself. In other words, it is the square of an integer.
To find if a number is a square number, we can take its square root and check if it is an integer.
Let's check the given numbers:
- 5 is not a square number because its square root is approximately 2.236, which is not an integer.
- 8 is not a square number because its square root is approximately 2.828, which is not an integer.
- 15 is not a square number because its square root is approximately 3.873, which is not an integer.
- 30 is not a square number because its square root is approximately 5.477, which is not an integer.
- 36 is a square number because its square root is 6, which is an integer.