A three-choice quiz of useful trivia: a collection of questions you can use in everyday life

About 24 years

Assuming an average lifespan of roughly 80 years and 8 hours of sleep each day, about one-third of a lifetime is spent sleeping. That amounts to approximately 24 years. Therefore, you could say you sleep for about 24 years over the course of your life.

spiciness

The five basic human tastes are sweet, salty, sour, bitter, and umami. Spiciness is not a taste but a type of pain sensation, perceived when pain receptors on the tongue are activated. While metallic taste is not classified as one of the basic tastes, it is a distinctive sensation sometimes experienced when metal touches the inside of the mouth and is occasionally considered within the broader scope of taste. Therefore, “spiciness” is not included among the human tastes, making it the correct answer.

There is no best-before date.

There is no best-before date for ice cream. However, this guideline applies when ice cream is stored properly at -18°C or below. Since this can vary depending on the best-before date printed on the package and how it is stored after opening, it’s important to follow the package instructions.

Seat near the central axle

In general, the seats near the axle—especially those in the middle—are considered least prone to motion sickness because the bus’s movement is minimal there. Seats at the front or back tend to feel more sway, which can make you more likely to feel sick. Sitting near the central axle can help reduce the motion and may significantly lower the chance of getting motion sickness.

#7119

In Japan, the phone number for emergency medical consultation is #7119. When you call this number, doctors and nurses can provide health-related advice and help you decide whether an ambulance is necessary. Meanwhile, #119 is Japan’s emergency number for ambulances and fire services, and #911 is the emergency number in the United States and some other countries.

Cut onions under water

When you cut an onion, you tear up because breaking the onion’s cells releases tear-inducing compounds. Cutting the onion under water dissolves these compounds into the water, reducing how much reaches your eyes and making tears less likely. Chilling the onion in the freezer can also help to some extent, but the resulting temperature difference can produce more vapor and still trigger tears. Applying lemon juice has little to no effect in preventing tearing.

to pickle in vinegar

Dirt on coins is often due to oxidation, and the acetic acid in vinegar can dissolve the oxidized metal and remove the grime. After soaking the coins in vinegar for a few minutes, gently scrubbing them with a soft brush should clean them. You cannot expect the same effect from olive oil or sugar.