True-or-false quiz for adults: a full roundup from common-sense questions to surprising trivia!
Did you know that hidden within the things we take for granted in our daily lives—things we casually use without a second thought—are actually some astonishing facts? From the unit used for a computer mouse, to the origin of SOS, to the history behind the tally mark “正” used for counting, everyday items are full of surprising truths.
We’ll introduce adult-friendly life trivia lurking in the everyday, presented in a true-or-false quiz format.
We’ve gathered questions that will make you think, “Wait, really?” as well as trivia you’ll be proud to brag about.
So, how many can you get right?
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Everyday Life Trivia Quiz (1–10)
The grooves carved into the toothpick serve as a non-slip feature.
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The groove at the tip of a toothpick is often said to serve as a non-slip feature or a rest for a used toothpick, but in fact it’s neither. During manufacturing, when the tip is sharpened, the wood on the end you hold can get scorched by the machine’s high-speed rotation, so the discolored part is simply shaved off for appearance’s sake. In other words, the groove carved into a toothpick has no particular meaning or use.
Sugar, Salt, Soy Sauce, Mirin, Miso. Among these, the one that does not exist as a surname is “Shoyu” (Soy Sauce).
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The one that doesn’t exist is the surname “Mirin.” All the others are real family names, and many of them are said to come from origins like making sugar (hence Satō, “sugar”) or managing a miso storehouse (hence Miso), and so on.
Even a police car on duty can be ticketed for illegal parking.
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Proceeding through a red light is permitted during emergency response, but parking violations apply even to patrol cars while they are enforcing the law.
If it’s underwater, you can cut glass with scissors.
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When scissors are inserted into glass underwater, water molecules composed of hydrogen and oxygen rapidly penetrate the crack and sever the bonds between oxygen and silicon that make up the glass. This phenomenon is called the chemomechanical effect.
Banks keep houseplants to estimate a robber’s height.
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The potted plants in banks are placed to provide a reference for a robber’s height if one comes in. Their height is standardized at around 170 cm. This measure is used because, while people can often describe noticeable features like clothing at a glance, it’s difficult to clearly state a person’s height.
