If q and r are both odd numbers C , which of the following must also be odd?
Choose the correct choice from the following answers.
A) q – r
B) (q + r)^2
C) q(q + r)
D) (qr)^2
E) q/r
We're told that q and r are both ODD numbers C. We're asked which of the following must also be odd.   IF...   q = 1   r = 3   Answer A) q – r = 1-3 = -2 NOT odd   Answer B) (q + r)^2 = (1+3)^2 = 16 NOT odd   Answer C) q(q + r) = (1)(4) = 4 NOT odd   Answer (qr)^2) (qr)^2 = (3)^2 = 9 This IS O(qr)^2(qr)^2   Answer E) q/r = 1/3 NOT odd   Final Answer:   (qr)^2
<result>D</result>
If q and r are both odd numbers C , which of the following must also be odd?