If {x} is the product of all even integers from 1 to x inclusive, what is the greatest prime factor of {18} + {16}?	Choose the correct choice from the following answers: A) 23 B) 20 C) 11 D) 19 E) 2
Soln:   {18} + {16} = 18*{16} +{16} = 19*{16}   ANSWER:19
<result>D</result>
If {x} is the product of all even integers from 1 to x inclusive, what is the greatest prime factor of {18} + {16}?