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(3) Which of the following is a perfect square?

A. 225
B. 168
C. 80


Sagot :

Sure, let's determine which of the given numbers is a perfect square.

A perfect square is a number that can be expressed as the product of an integer with itself. In other words, it is a number that can be written as [tex]\( n^2 \)[/tex] where [tex]\( n \)[/tex] is an integer.

Here are the numbers given for consideration:

1. 225
2. 168
3. 80

Let's check each number.

1. 225:
- To check if 225 is a perfect square, find its square root.
- The square root of 225 is 15.
- Since 15 is an integer, 225 is a perfect square because [tex]\( 15 \times 15 = 225 \)[/tex].

2. 168:
- The square root of 168 is approximately 12.96.
- Since 12.96 is not an integer, 168 is not a perfect square.

3. 80:
- The square root of 80 is approximately 8.94.
- Since 8.94 is not an integer, 80 is not a perfect square.

Hence, among the numbers provided, 225 is the perfect square.