1 
Boolean algebra\Sets\Complement 
Intermediate 
Undergraduate 
Foundation 
2 
Boolean algebra\Sets\Venn diagrams 
Intermediate 
Undergraduate 
Foundation 
3 
Boolean algebra\Sets\Union 
Intermediate 
Undergraduate 
Foundation 
4 
Boolean algebra\Sets\Union 
Intermediate 
Undergraduate 
Foundation 
5 
Boolean algebra\Sets\Subsets 
Hard 
Undergraduate 
Foundation 
6 
Boolean algebra\Sets\Intersection 
Intermediate 
Undergraduate 
Foundation 
7 
Boolean algebra\Sets\Elements 
Intermediate 
Undergraduate 
Foundation 
8 
Boolean algebra\Sets\Elements 
Intermediate 
Undergraduate 
Foundation 
9 
Boolean algebra\Sets\Difference 
Intermediate 
Undergraduate 
Foundation 
10 
Boolean algebra\Sets\Counting 
Hard 
Undergraduate 
Foundation 
11 
Boolean algebra\Sets\Counting 
Easy 
Undergraduate 
Foundation 
12 
Boolean Algebra\Sets\Intervals 
Intermediate 
Undergraduate 
level1 
