Undecided questions
What's the difference between "생각하다"&"기억하다"?

생각하다 is to think(想).
기억하다 is to remember(記得).

(Posting by request from a comment because I don't want the commenting system to kill the formatting.)

I'll show you a few examples of the usages of the two words to clarify the difference.
생각하다 (to think)
- 어떻게 생각하세요? What do you think?
- 저는 ...라고 생각해요. I think that ....
- 뭐라고 생각하고 있어요? What are you think about?
- 이것 무슨 뜻이라고 생각해요? What do you think this means?

기억하다 (to remember)
- 아직 기억하세요? Do you still remember?
- 그 분의 성함을 기억 안 나요. I don't remember his name.
- 그 친구의 전화번호를 아직 기억해요? Do you still remember that friend's phone number?
- 아까 부탁한 것 기억해요? Do you remember what I asked you to do earlier?