Math 301                                                                                                    Name: KEY
Quiz 6

  1. Write the contrapositive of each of the following.
    1. If $5|n^{2}$ then $5|n.$

 

 

 

    1. If the sum of two integers is less than 200, then at least one of the integers is less than 100.

 

 

 

  1. Let $A,B,$ and $C$ be sets. Prove the following using the method of Proof by Contradiction: If $C\subseteq B-A,$ then MATH