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If K={x: x is a perfect square less than 50}, which element does not belong to K?
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Answer and explanation
Correct answer: 48
A perfect square is the square of an integer or whole number. Here 16=4², 25=5², and 36=6², so all three are perfect squares less than 50. Although 49=7² is also in K, 48 is not the square of any integer. Therefore 48 does not belong to K, making option D correct.
Frequently asked questions
What is the correct answer to this question?
48
Why is this the correct answer?
A perfect square is the square of an integer or whole number. Here 16=4², 25=5², and 36=6², so all three are perfect squares less than 50. Although 49=7² is also in K, 48 is not the square of any integer. Therefore 48 does not belong to K, making option D correct.
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Common Questions.
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