Answer:
198
Step-by-step explanation:
So what we can do here is called process of elimination. We know it cannot be anything that does not end in 8 (always adding 10), so it can't be 242 or 230. Next, we can just list the terms :
78,88,98,108,118,128,138,148,158,168,178,188,198
198 is 12th (20-8), so it is our answer
