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

Heat in the microwave

You can restore the crispiness of soggy rice crackers by heating them in the microwave to evaporate the moisture. Chilling them in the refrigerator will make them even soggier, and simply kneading them in a plastic bag won’t remove the moisture or improve them.

1 to 2 hours before bedtime

The ideal time to take a bath is said to be 1 to 2 hours before bedtime. Taking a bath temporarily raises your body temperature, and as it gradually drops afterward, you naturally become sleepy, which can improve sleep quality. Bathing at this time also provides a relaxing effect, helping you effectively recover from the day’s fatigue. If you struggle with sleep, try bathing at this timing.

15 to 20 minutes

The most effective nap is considered to be a short one of about 15 to 20 minutes. A nap of this length helps refresh the brain and restore memory and concentration. Because you don’t fall into deep sleep, it’s easier to wake up and less likely to negatively affect your daytime activities. Especially when you feel tired during work or study, a short nap like this can efficiently replenish your energy.

carbonated drink

When you want to remove tarnish or discoloration from silver accessories, using a carbonated drink can actually be effective. Carbonated beverages contain acidic components that loosen dirt and oxides on the surface of silver items, making them easy to remove. To use, soak the silver item in a carbonated drink for a few minutes, then gently polish it with a soft cloth. However, leaving it for too long can have the opposite effect, so keep the soaking time short. Also, if the item is decorated, take care not to damage the decorative parts.

45 degrees

The angle for the most respectful bow is 45 degrees. Compared to other bows, it is slightly deeper, and after lowering your head, you should look at the tips of your own toes. This bow is used when apologizing and when greeting or seeing off important guests.

1 to 2 hours before bedtime

The best time to take a bath is said to be 1 to 2 hours before bedtime. When a person’s core body temperature drops, it naturally induces sleepiness. After warming your body in the bath, your temperature gradually falls, which helps you fall asleep smoothly and is believed to promote higher-quality sleep. Because it also enhances relaxation, it’s recommended for people who have trouble falling asleep or who want more comfortable sleep to bathe during this time window.

Bask in the morning sun

The human body clock follows a roughly 24-hour rhythm, but in reality it gradually drifts. The most effective way to reset it is to get sunlight—especially morning sunlight—right after you wake up. When your eyes take in morning light, signals are sent to the brain, resetting your internal clock to the correct time. It also positively affects hormone secretion and sleep quality, so getting morning sunlight every day helps maintain good health.