Here are links to a couple of simple logic tests I came across. Just as we have to exercise our bodies we have to exercise our minds. Enjoy.
Hint for those of you who are unfamiliar with formal logic, there is a difference between a valid argument and a sound argument. A valid argument is one where if all the premises are true, then the conclusion must be true. A sound argument is a valid argument where we know that all the premises are true.
Logic Test 1
Logic Test 2