If q and t are positive integers, qt + q + t cannot be Choose the correct choice from the following options:
A) 5
B) 6
C) 7
D) 8
E) 9
Let qt + t +q = x   Add 1 on both sides:   qt + t + q + 1 = x + 1   tq + 1) + q + 1 = x + 1   (q + 1)(t + 1) = x + 1   Minimum value of (q + 1) = 2   Minimum value of (t + 1) = 2   Hence x + 1 cannot be prime   Substitute x from the given options:   6 + 1= 
<gadget id="calculator">  6 + 1</gadget>
<output>7</output>
7 --&gt; prime --&gt; qt + t + s cannot be 6   Answer: 6
<result>B</result>
If q and t are positive integers, qt + q + t cannot be