An even and an odd integer are multiplied together. Which of the following numbers could not be the square of their product? Choose the correct choice from the following:
A) 4
B) 16
C) 25
D) 36
E) 100
25 = 5^2 so it can not be the square of an even number multiplied by an odd number.   The answer is 25.
<result>C</result>
An even and an odd integer are multiplied together. Which of the following numbers could not be the square of their product?