[For Seniors] Introducing Scary Trivia Quizzes & Fun Facts!
This time, I’d like to talk about some “scary trivia” lurking in our everyday lives.
Trivia is like a little spice.
The more you learn, the more you may feel not only fear, but also a curious sense of fascination.
For older adults in particular, thinking through quiz questions can increase cerebral blood flow and help prevent cognitive decline.
It also boosts concentration and attention, making it great training.
I hope this trivia will be of some help the next time you share scary stories.
It can also be a chance to deepen connections with older people around you, so please make good use of it.
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[For Seniors] Introducing Scary Trivia Quizzes & Fun Facts! (21–30)
There’s a theory that the “oyaji” in the saying “earthquakes, thunder, fire, and oyaji (father)” originally referred to a natural disaster. What was it?
- avalanche
- tsunami
- typhoon
See the answer
typhoon
There is a theory that the phrase “earthquakes, lightning, fires, and fathers” originally was “earthquakes, lightning, fires, and Ōyamaji.” Ōyamaji refers to a typhoon, and because its pronunciation is similar, it may have come to be read as oyaji (“father”).
How many teeth does a snail have?
- 10 pieces
- 1,000 pieces
- over 10,000 (items/bottles/etc.)
See the answer
over 10,000 (items/bottles/etc.)
Snails are said to have the most teeth of any creature in the world, with anywhere from 10,000 to over 20,000. Their teeth are on a structure called a radula, which is shaped like a rasp or grater.
Which of the following is correct as a measure against diarrhea?
- Hydrate to prevent dehydration
- eat fried food
- cool the body
See the answer
Hydrate to prevent dehydration
Severe diarrhea or diarrhea that lasts for a long time causes the body to lose fluids and nutrients. This can lead to dehydration and malnutrition. Sip oral rehydration solutions, sports drinks, cooled boiled water, or room-temperature mineral water to prevent dehydration.
True or false: Washing your hair with cold water causes hair loss.
- ○
- ×
See the answer
○
If you wash your head with cold water, you won’t be able to thoroughly remove dirt from the scalp. Cold water tightens the pores, making it difficult to clean away buildup properly, which can lead to issues like hair loss and thinning.
In the Edo period, when high-ranking women did a certain act, there were people who stood in as substitutes. What were they substituting for?
- sneaking a bite
- fart
- leftovers
See the answer
fart
It’s said that in those days, some high-status women were so embarrassed about passing gas in public that they even took their own lives or became reclusive. So it wouldn’t be surprising if there were people whose job was to pass gas on their behalf.
Do tears change their taste depending on the emotion felt when they are shed? True or false?
- ○
- ×
See the answer
○
The taste of tears is altered by sodium, and the difference arises because the sympathetic and parasympathetic nerves, which control the tear glands, function differently depending on emotion. When the sympathetic nervous system is dominant, the sodium concentration in body fluids increases, making tears taste salty. When the parasympathetic nervous system is dominant, the sodium concentration does not rise, and tears become more watery with a slightly sweet taste.
People say that if you pick up something you dropped within three seconds, it’s fine—but is that really true?
- 1 second
- 5 seconds
- It's already no good the moment you drop it.
See the answer
It's already no good the moment you drop it.
The so-called “three-second rule,” which says it’s safe to eat food if you pick it up within three seconds, doesn’t seem to have any scientifically valid basis. It’s known that a large number of bacteria adhere to food the moment it hits the ground. In other words, it’s not safe as soon as it’s dropped.


