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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?

Food and Cooking Trivia Quiz (1–10)

The number of kernels on a corn cob is always odd.

The number of kernels on a corn cob is always odd.
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The number of kernels on a corn cob is always even. It’s said that this is because the structure of the cob pairs the kernels in two rows, resulting in an even count. It’s a fun little fact about a common food that reveals a hidden pattern in nature.

The reading of “松阪牛” is “Matsusaka gyū.”

The reading of “松阪牛” is “Matsusaka gyū.”
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Matsusaka Beef is a domestic brand of wagyu primarily raised in Matsusaka City, Mie Prefecture. It is pronounced “Matsusaka-ushi” or “Matsusaka-gyu”; pronouncing it with a voiced ‘z’ as in “Matsuzaka-gyu” is incorrect. Incidentally, besides these two, the name “Matsusaka-niku,” read as “matsusaka-niku,” is a registered trademark.

There was a court case disputing whether tomatoes are vegetables or fruits.

There was a court case disputing whether tomatoes are vegetables or fruits.
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Tomatoes are classified as vegetables known as fruit vegetables. However, in 19th-century America, there was a court case disputing whether tomatoes were fruit or vegetables. At the time, a law imposed no tariffs on fruit but did impose tariffs on vegetables, which is said to have sparked the dispute.

In the cooking mnemonic “sa-shi-su-se-so,” the “so” stands for sauce.

In the cooking mnemonic “sa-shi-su-se-so,” the “so” stands for sauce.
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In the culinary mnemonic “sa-shi-su-se-so,” the “so” refers to miso, not sauce. Specifically, “sa” is sugar, “shi” is salt, “su” is vinegar, “se” is soy sauce (from the old spelling ‘seuyu’), and “so” is miso. This phrase indicates the basic order of seasonings in Japanese cooking and is very important, so it’s a good one to remember.

Strawberries are vegetables.

Strawberries are vegetables.
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Strawberries are generally treated as fruit, but according to the classification of Japan’s Ministry of Agriculture, Forestry and Fisheries, they are categorized as vegetables. This is because strawberries are herbaceous plants that do not grow on trees and are cultivated as annuals or biennials for food. Additionally, since the term “fruit” often refers to produce that grows on trees, strawberries are included among vegetables.