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you can multiply two whole numbers together to get that. if you use graph paper, you could make a perfect square. the area of that square is called a perfect square because you can make a perfect square using that many units as the area. for example 4x4=16, so 16 would be the perfect square.

Q: Why is a number a perfect square?

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If by 'perfect number' you mean 'perfect SQUARE', then yes. 49 is an odd number and a perfect square.

You take the square root of the number. If it is a perfect square, this will be a whole number. If it is not, it isn't a perfect square.

Well, technically, it is the square of 11.18033989...but it is not a perfect square(a perfect square is the square of a whole number. 1,4,9,16,25,36,49,64,81,100,121,144,169,196,225,256, etc.)

27 is a not perfect square.

It depends on the number that it is a perfect square of!

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Then the number is called a "perfect square".Then the number is called a "perfect square".Then the number is called a "perfect square".Then the number is called a "perfect square".

For a number to be a perfect square, the number's square root has to be a whole number. 9 is a perfect square because its square root is a whole number, 3. If the square root of the number is a decimal, then it is not a perfect square. For example, 13 does not divide evenly so it not a perfect square.

If by 'perfect number' you mean 'perfect SQUARE', then yes. 49 is an odd number and a perfect square.

There is not a number that is a perfect square and perfect cube between 1 and 25.There is not a number that is a perfect square and perfect cube between 1 and 25.There is not a number that is a perfect square and perfect cube between 1 and 25.There is not a number that is a perfect square and perfect cube between 1 and 25.

20 is a not perfect square.

You take the square root of the number. If it is a perfect square, this will be a whole number. If it is not, it isn't a perfect square.

It is the definition of a perfect square.

Well, technically, it is the square of 11.18033989...but it is not a perfect square(a perfect square is the square of a whole number. 1,4,9,16,25,36,49,64,81,100,121,144,169,196,225,256, etc.)

It is a square number but not a perfect square number.

195 is a not perfect square.

No, 80 is a not perfect square.

No, 1,000 is a not perfect square.