so disappointed... can't believe this come out from the teacher mouth.
"if you see this math question in the exam, just skip it", i can't believe what he said in the class. Although in the exam there will be only 1 or 2. However, at least briefy explain on how to do it. SIGH
if thing come down to math, there are alway some ways to calculate the answer.
this "SIR" SUCK !!
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