I took an exam today and one of the multiple choice questions had no right answers (found out after exam), but I was so confused because it was such an easy question. Anyway I was stuck on this question for a while and it ultimately led me to rush the rest of the exam due to the time limit. Am I exaggerating or is that ridiculous. How could a college exam have a mistake like that on one of my biggest exams of the semester. Also what is 10 + 10? What are Warren Buffet's five principles?