Dear Wentao, Please consult https://sites.math.rutgers.edu/~zeilberg/Hist21/mt2S.pdf for the full solutions. You got 113 points (out of 120) Here is what you got wrong: #4(d): -2 points (you did not finish) #9: -2 points (Warden of the Mint) #11(b): -3 points (Euler is wrong, should be Napier) Best wishes, Dr. Z.