Answer:
1 is incorrect, A is the whole oval. B doesn't matter.
2 is correct
3 is incorrect, the shared part belongs to A or B as well
4 is correct
5 is correct
6 is correct
7 is correct
8 is correct (compare to 3, it should be the inverse!)
9 is incorrect, only B with A excluded must be shaded
10 is incorrect, the whole of A must be included
Explanation:
If you point to any place in the picture, you must be able to evaluate the expression to "TRUE". Take number 10, if you point to the shared area of A and B, you can say "A or !B" is TRUE because you are inside A, so the expression is TRUE or FALSE which is TRUE.
