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Question
Which of the following number square of even number?
373758
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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