One very popular brain teaser is: "A sundial has the fewest moving parts of any timepiece. Which has the most?" Another one is: "Two boxers are in a match scheduled for 12 rounds. One of the boxers gets knocked out after six rounds, yet no man throws a punch. How is this possible?" A popular riddle from the Bible is Samson's riddle. It goes like this: "Out of the eater, something to eat; out of the strong, something sweet."
The first riddle with the sundial is a tricky one because most people begin thinking of very technologically advanced watches with many moving pieces; however, the answer is to be found in ancient times. It is the hourglass: all those tiny pieces of sand comprise more moving parts than any modern watch has.
The second riddle is tricky as well, because the listener starts thinking about how it would be possible to knock somebody out without a punch in a boxing match. The answer is that both boxers are female, hence no man throws a punch.
Samson's riddle is a very specific one. He tells the riddle during a feast he hosts for his acquaintances. If any of the guests can answer the riddle he offers to award him with 30 articles of clothing. The answer is bees that are making a honeycomb inside a lion's carcass. Samson had killed the lion some time ago, and noticed the bees inside it while he was on his way to the feast.