sentence 1: How do I know if I'm good?
 sentence 2: How do I know what I'm good at? sentence 1: What are my chances/ How can I improve my chances of getting into an Ivy league or UC school?
 sentence 2: What can I do to improve my chances of getting into an Ivy League school? sentence 1: Which country has been the most peaceful, relatively, throughout history?
 sentence 2: What is (was) the most peaceful nation in history?
not same meaning
same meaning
same meaning