Dear Kishan.

 Please consult

https://sites.math.rutgers.edu/~zeilberg/Hist21/mt1S.pdf

for the full solutions.

You got  71 points (out of 120).

Here is what you got wrong:

#2: -10 points

#3: -10 points (not attempted)

#5: -7 points (you started correctly, but did not continue)

#7: -2 points (an EF is a sum of DISTINCT unit fractions)

#8: -10 points (see answer key)

#12: -10 points (see answer key)











 Best wishes,

   Dr. Z.