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[Challenging and Fun!] Quizzes & Riddles for Adults

We’re introducing riddles and fun quizzes for adults!

When you hear “riddles” and “quiz questions,” you might think they’re for kids, but these days there are quiz shows that adults can enjoy too, making them fun for all ages.

In this article, we’ve put together some slightly challenging riddles and quizzes for adults.

They’re especially recommended for grown-ups, whose thinking can sometimes get a bit rigid!

Try them as brain training, too.

You might be surprised by how difficult they are!

[Challenging and Fun!] Quizzes & Riddles for Adults (21–30)

[Cryptography Puzzle] Solve the mystery of the cipher! All 9 questions!

[Cipher Quiz] 9 Questions Total! Decode the hidden words in the ciphers!
[Cryptography Puzzle] Solve the mystery of the cipher! All 9 questions!

You can’t easily arrive at the answer at first glance.

But with a bit of thought, every problem becomes satisfying and clear.

The generously long time limit is another plus.

Enjoy the full thrill of that aha! moment when the answer clicks.

[High-level Riddles] Riddles for Advanced Players!

[High-Level Riddles] 15 Questions! Riddles for Advanced Players!
[High-level Riddles] Riddles for Advanced Players!

These are high-level riddles geared toward advanced solvers, packed with problems that will make you instinctively go “Ah!” when you hear the answer.

Many people will probably find them utterly baffling if they think about them in a straightforward way.

You’re given plenty of time to think, but the more you ponder, the more confusing they might become (lol).

The hints and answers are always hidden within the problems themselves, so read them carefully.

If you want to loosen up your thinking and gain a flexible mindset, definitely try these riddles.

Brain training with tough quizzes! Try taking on these pretty difficult riddles!

Brain Teasers: Train your mind with tough quizzes! Try these pretty difficult riddles!
Brain training with tough quizzes! Try taking on these pretty difficult riddles!

It challenges you to think flexibly about difficult problems.

Clear illustrations appear on the screen, but the countdown to your answer ticking away in the lower left corner creates just the right amount of pressure.

All the more reason why the feeling of relief when you get it right is incredibly satisfying.

Because we’re adults, we tend to overthink! 10 surprisingly tricky quizzes

Because we’re adults, we tend to overthink! 10 surprisingly tricky quizzes
Because we’re adults, we tend to overthink! 10 surprisingly tricky quizzes

There are 10 story-based questions.

It’s often said with quiz questions that children find them easy, but adults can’t solve them because they’re too set in their ways.

This quiz features exactly those kinds of problems.

You answer while watching the video—hints and answers are hidden in the visuals, so take a close look and think it through.

That said, the thinking time is 10 seconds; if you can answer within that, you might be amazing! If you don’t overthink it and keep it simple, you may find it surprisingly easy.

[For adults/advanced] A set of 7 riddles impossible to get all correct

[For adults/advanced players] A slightly difficult riddle quiz where it’s impossible to get every question right! Give it a try!
[For adults/advanced] A set of 7 riddles impossible to get all correct

Many people enjoy riddles, but for adults who are tired of kiddie-level puzzles, these advanced, adult-oriented riddles are highly recommended.

With high-level riddles, even if you figure out the answer, some people might not immediately grasp why that answer is correct.

This video is helpful because it carefully explains how each answer is derived.

Try tackling riddles that are a bit tougher than usual to loosen up and refresh a mind that’s become rigid from daily routines.

Exercise your brain with tricky riddles! Can you solve all the cipher quizzes within the time limit? Try it in 30 seconds!

Exercise your brain with tricky riddles! Can you solve all the cipher quizzes within the time limit? Try it in 30 seconds!
Exercise your brain with tricky riddles! Can you solve all the cipher quizzes within the time limit? Try it in 30 seconds!

In recent years, there’s been a rise in quiz shows on TV, and with the unprecedented puzzle-solving boom, more and more people are tackling quizzes in their daily lives.

Riddle-like brain teasers that you can’t solve at a glance require approaching the answer from multiple angles, making them great for brain training.

It can also be fun to test kinds of creativity you don’t often use in everyday life—like visualizing kanji or converting things into English.

These are mental exercises I especially recommend to adults, who tend to have stronger preconceptions.

A quiz that’s scary once you know the answer

A scary story that becomes terrifying once you grasp the meaning—would University of Tokyo students figure it out super fast? A mood-ruining rapid-fire quiz battle! A world you’ve never known is right here…
A quiz that's scary once you know the answer

Let’s try some quizzes that become creepier the more you understand them! We’ll introduce quizzes that get scary once you figure out the answer.

They’re humorous quizzes recommended for hot days or for people who enjoy scary stories.

They’re based on “stories that are scary once you understand them,” and the fun part is answering what exactly makes each story scary.

The videos themselves don’t have any horror elements and have a bright tone, so give at least one question a try.

It’s also great to tackle them with family, a partner, or friends.

Surprisingly tricky! 10 Riddles and Trick Questions

Brain Teasers: Surprisingly Difficult! 10 Riddles and Trick Questions
Surprisingly tricky! 10 Riddles and Trick Questions

These are tough questions that let you enjoy that “aha!” moment when, upon seeing the answer, everything makes sense and your frustration turns into clarity.

There are plenty of tricks, wordplay, and riddles, so you can enjoy them without getting bored.

Some problems are long, but the white text on a black background makes them easy to read.

What part of speech is “strawberry”?

If you’re asked what language “strawberry” is, you’d naturally say English.

But this is a trick question! The answer isn’t English.

So what is it? To solve it, you need to realize it’s a trick and notice that the “go” in “nani go” (“what language”) is written in hiragana, not the kanji for “language.” And what does “strawberry” actually refer to in the first place? Once you see that, you’ll reach the answer! It’s a question that tends to be swayed by your knowledge, but a child might answer it in an instant.

What is something you use but cannot own?

What is something you use but cannot own?

Scissors, pencils, erasers, rulers… most tools you’re familiar with are basically things you hold in your hand to use, right? So let’s try a riddle: “What can be used but cannot be held?” You might think of various tools, but you won’t easily get the right answer if you only think in terms of “objects.” First, try considering things you can use that aren’t objects.

By the way, the answer is “your name.” You use it when introducing yourself or when you want friends to know about you, but you certainly can’t “hold” it.