1) You walk into your first college math class and the professor tells you to shake hands and introduce yourself to every other student in the classroom. Every student shakes hands with every other student exactly once. How many handshakes were there (there are 10 students in class)?
Answer: The total handshakes that would be made were 45.
2) After everyone finishes shaking hands an eleventh student walks in to class. How many handshakes will there be (total) after he is done shaking hands?
Answer: The total handshakes that would be made were 55.
3) What would be the total if there were 20 students in the class?
Answer: The total handshakes that would be made were 190.
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