Because the square root isn't listed twice.
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Every number has an even number of factors. If the number is a perfect square,
then two of its factors are equal, so the pair looks like a single number.
No. Squares and regular hexagons, both with an even number of sides, can make regular tessellations.
7 * * * * * What? 73 = 343 which is the square of 18.52... hardly a perfect square! The correct answer is 9.
the product of two integers is odd if and only if the two factors are odd
The product of two odd numbers is always an odd number.
One possible conjecture: The product is always an odd number. Another possible conjecture: The product is always greater than either of them. Another possible conjecture: Both odd numbers are always factors of the product. Another possible conjecture: The product is never a multiple of ' 2 '. Another possible conjecture: The product is always a real, rational number. Another possible conjecture: The product is always an integer.