W=17 im too good at math to be wrong about this
Substitute p and q with the given numbers (6 and 5) then use pemdas
18+42/6-5= 20
Answer: The numbers are decreasing by 2. So that means that the eighteenth number would be -29.
Explanation:
{5, 3, 1, -1, -3, -5, -7, -9, -11, -13, -15, -17, -19, -21, -23, -25, -27, -29...}