I stand by my original comments.  To "forget" usually takes more than 5 minutes.  Even your rounding skills have not improved, though there have been specific, directed efforts on this point.
Before submitting any more questions, provide answers:
Why are you studying this material?  Fun?  Work?
Who told you it was appropriate material for you to study?  Exam?  Friend?  Mathematics Professional?
What evaluation took place for purposes of advising you?  Exam?  Transcript?  Hunch?
What is your situation in life that causes you to pursue such things?  Back-to-school later in life?  Minor brush-up prior to important examination?
What additional background have you in mathematics?  Algebra?  Trigonometry?  Calculus?
What are your goals in these pursuits?  Upgrade skills?  Learn new things?  Meet requirements?
How are you studying?  Teacher?  Book?  On-line Course?
So far, it just seems like random dumping of questions, entirely without direction or purpose.