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Question
Using prime factorization method, find which of the following numbers are perfect square?
3549
Solution
3549 = 3 x 7 x 13 x 13
Grouping them into pairs of equal factors:
3549 = (13 x 13) x 3 x 7
The last factors, 3 and 7 cannot be paired. Hence, 3549 is not a perfect square.
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