noun
A word that represents a person, place, thing, or idea. In this case, 'number' is a noun as it represents a quantity or value.
adjective
A word that describes or modifies a noun. 'Perfect' is an adjective that describes the type of square number.
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A perfect square number is a number that can be expressed as the product of an integer with itself.
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Hey, did you know that 25 is a perfect square number because it can be written as 5 times 5?
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Dude, 64 is like the ultimate perfect square number, it's 8 squared!
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In the puzzle, finding the missing perfect square number felt like discovering the final piece of the puzzle.