1) Q:        You have 12 coins and a balance.  One of the 12 coins has a different weight than the others (either heavier or lighter), can you figure
out which one it is and whether it is heavier or lighter in 3 weighings?


2) Q:
what is greater than god,
more evil than the devil,
the poor have it,
the rich need it,
and if you eat it, you'll die
what is it?

80% of kindergarten students were able to answer it, while only 17% of
stanford university seniors could provide the correct answer.