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Which of the following is a perfect square ?

  • a)
    45                      

  • b)
    81                

  • c)
    18              

  • d)
    54

Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
Which of the following is a perfect square ?a)45 b)81 ...
Perfect Square

A perfect square is a number that is the result of squaring a whole number. For example, 9 is a perfect square because it is the result of squaring 3 (3x3=9).

Solution

Out of the options given, we need to determine which one is a perfect square.

a) 45 is not a perfect square because there is no whole number that can be squared to get 45.
b) 81 is a perfect square because 9x9=81.
c) 18 is not a perfect square because there is no whole number that can be squared to get 18.
d) 54 is not a perfect square because there is no whole number that can be squared to get 54.

Therefore, the correct answer is option 'B', 81 is a perfect square.
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Community Answer
Which of the following is a perfect square ?a)45 b)81 ...
81 is the square of 9..... 9 × 9 = 81
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