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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Food and Cooking Trivia Quiz (1–10)
Tomatoes were originally grown as ornamental plants.
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Tomatoes were believed to be poisonous and began to be cultivated as ornamental plants in the early 16th century. About 200 years later, when Italians suffering from famine started eating them, they gradually became popular as food.
Shaved ice has been eaten since the Heian period.
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Incidentally, the original name for shaved ice was “natsugōri.” In reference to this, July 25 (7=na, 2=tsu, 5=go) is designated as Shaved Ice Day.
The Chinese dish ebi chili originated in Japan.
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Ebi chili is a dish adapted from authentic Chinese cuisine—shrimp stir-fried in a spicy sauce—devised by Kenmin Chen, known as the “father of Chinese cuisine in Japan.” Incidentally, Tenshinhan (天津飯) is also said to have originated in Japan!
Yuzu kosho doesn’t contain pepper.
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Yuzu kosho does not typically contain black or white pepper as spices. Yuzu kosho is a condiment made primarily by grinding together yuzu zest, green chili peppers, and salt. The name “kosho” comes from a Kyushu dialect in which chili peppers are called “kosho,” and the ingredient actually used is chili pepper. For this reason, genuine yuzu kosho does not include pepper itself.
The difference between somen and hiyamugi lies in their ingredients.
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Both somen and hiyamugi are noodles made from wheat flour, but the difference lies in their thickness. Somen are relatively thin, with a diameter of less than 1.3 mm. In contrast, hiyamugi are defined as having a thickness of at least 1.3 mm and less than 1.7 mm.



