If q, r, and s are consecutive even integers and q < r < s, which of the following CANNOT be the value of s^2 – r^2 – q^2? Choose the correct option:
A) -20 B) 0 C) 8 D) 12 E) 16
s &gt; r &gt; q are consecutive even integers   Testing for s2−r2−q2   I: For s = 0, r = -2, q = -4,   s2−r2−q2=−20   II: For s = 2, r = 0, q = -2   s2−r2−q2=0   III: For s = 4, r = 2, q = 0   s2−r2−q2=12   Step II &amp; Step III have consecutive representation of values of s, r, q. No other combination is possible.   8 cannot be the answer as for value of s = 6 &amp; above, the resultant would be greater than 12   Answer = 8
<result>C</result>
If q, r, and s are consecutive even integers and q < r < s, which of the following CANNOT be the value of s^2 – r^2 – q^2?