A three-hint quiz that even adults will scratch their heads over. A collection of brain-training puzzles.

hair dryer

If it blows air and dries, it sounds like we’re already talking about a hair dryer. Many people probably use one not only after a bath, but also when getting ready. Hair dryers were born in Europe at the end of the 19th century. In Japan, the first one is said to have been released in 1937 by what is now Panasonic.

kotatsu

When it comes to things that keep you warm in winter, there are all sorts of options like stoves, fan heaters, blankets, and scarves. But if it’s similar to a futon and makes you not want to get out, it has to be the kotatsu. Once you get under it, you really can’t bring yourself to leave, and I’m sure many people have ended up dozing off and catching a cold because of it.

bicycle

Cars, trains, and buses are options too, but since some aren’t electric and children can ride them, bicycles are the way to go. The environment surrounding bicycles has changed—tandem riding that used to be allowed is now prohibited, and bicycle insurance has been introduced—but both then and now, bicycles remain a familiar means of transportation for us.

Pizza

When you think of a round food loaded with lots of toppings that’s loved by everyone from kids to adults, pizza comes to mind, right? It’s said that pizza, in the form we know today, was born in Italy around the 16th century. However, records show that as far back as ancient Egypt in the pre-Christian era, people were already making something that could be considered the root of pizza.

Tokyo Skytree

Tokyo Skytree is Japan’s tallest broadcasting tower, standing 634 meters high. Alongside Tokyo Tower, it’s a landmark that represents Tokyo. It has observation decks where you can enjoy 360-degree views. Its official mascots are Sorakara-chan, Teppen-pen, and Sukoburuburu.

eel

The eel’s slimy mucus is a type of protein that serves to prevent water from entering its body. It’s said that if water does get inside, the eel swells up like a blister and dies. As a high-end ingredient, eel is often mentioned among luxury foods, and the classic dishes are unajū (eel over rice in a lacquered box) and kabayaki (grilled eel with sauce).

gratin

Hot, piping, and delicious gratin. It’s known as a dish that originated in France’s Dauphiné region. It’s often made with a macaroni base, but sometimes it’s made with potatoes. A similar dish is doria, but doria uses rice as its base.