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Question
Which of the following number square of even number?
373758
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Solution
The numbers whose last digit is odd can never be the square of even number. For each number, use prime factorisation method and make pairs of equal factors.
373758 = 2 x 3 x 7 x 11 x 809
Here, each factor appears only once, so grouping them into pairs of equal factors is not possible. It means that 373758 is not the square of an even number.
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