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A natural number m is called a perfect square if it can be written as:
A2n for some integer n
Bn² for some natural number n
Cn + n for some natural n
D2ⁿ for some natural n
Answer & Solution
Correct answer: B. n² for some natural number n
By definition, a perfect square is a natural number expressible as n² where n is itself a natural number. So 1, 4, 9, 16, 25, … are perfect squares.
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