So that it will no longer be a park with no one in it

This riddle follows a classic trick-question pattern. The condition of “an empty park” includes B himself. If B plays in the park, the situation is no longer “empty.” In other words, the moment B is in the park, the condition of “no one is there” is not met, so he absolutely cannot play. The easy-to-miss point is the meaning of the Japanese phrase for “no one,” so be mindful of the wordplay.

3

People tend to compute this problem normally and answer “100 ÷ 2 + 1 = 51,” but the key is the phrase “divide by half.” Half of 100 is 50, so you can set up the expression as “100 ÷ 50 + 1 = 3.” Therefore, the answer is 3.

5 pieces

If you read the problem statement carefully, it doesn’t say that the bananas are in the basket. The bananas were on a plate. Therefore, the only items in the basket are two apples, one mandarin orange, and two peaches—five items in total. With trick questions like this, it’s important to read the text carefully.

Because it was a public bath

At first glance, a man openly walking around completely naked seems like he’s about to be arrested, but the twist is that the scene takes place inside a public bathhouse. Since a bathhouse is a bathing facility, being fully naked is normal there and of course not a crime. These kinds of quizzes cleverly camouflage the conditions and twist the answer to create an “annoying” impression. The trick to solving such bait-and-switch quizzes is to read the question without being constrained by common assumptions or preconceived notions.

Because the bus wasn’t crowded and there were empty seats.

This problem is a trick quiz that plays on our preconceptions and assumptions. When we hear that an elderly woman with a cane got on the bus, many people naturally think someone ought to give up their seat. But in reality, the bus was nearly empty with plenty of vacant seats, so no one needed to go out of their way to offer theirs.

Nothing is happening.

This problem is a trick quiz that tends to make you overthink. At first glance it seems like something strange is happening, but the answer is that nothing is actually happening. If you think about it, “tojiru” and “shimar(u)” both mean the same state: “closed.” Because of assumptions and preconceptions, we tend to look for unnecessary causes, but we should also consider the possibility that nothing is really happening.

one year

The trick is that the choices include not only spring, summer, autumn, and winter, but also “one year.” Many people tend to think about which of the four seasons lasts the longest, but in this case the answer is “one year.” It’s one of those annoying quizzes that are easy to get tripped up on if you try to solve them using common sense or assumptions.