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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 (11–20)

A quiz that requires creativity

[Trick Questions] 5 back-to-back quizzes that demand out-of-the-box thinking!
A quiz that requires creativity

These are ultra-difficult quizzes where flashes of inspiration and creativity are the keys to solving the problems.

The questions are designed so that simply reading and answering them as written often won’t reveal the correct answer—or will even lead you to a wrong one.

Intuitive thinking—such as concretely considering what’s actually needed—can provide hints that lead you to the solution.

Since clever, witty reasoning is required, it’s recommended to approach the problems with a unique mindset and a multifaceted perspective.

Why not try these ultra-challenging quizzes that are sure to bring a smile to your face when you hear the answers?

Flash of inspiration riddle-solving quiz

[Difficult Quiz] A flash of insight riddle that reveals whether you're a genius or an idiot in 30 seconds
Flash of inspiration riddle-solving quiz

This quiz is the type of brainteaser where, if you think you don’t know the answer, you could go on forever without finding it—but if you change your perspective or approach just a little, the answer pops into place as if by inspiration.

The moment it clicks, what you’ve been looking at appears completely different, so it’s also recommended for people who want to keep their minds flexible.

By regularly solving quizzes from various angles like this, you might make new discoveries in your daily life and end up living more enjoyably and conveniently.

Super difficult ‘Aru-Nashi’ quiz

Can you solve it faster than University of Tokyo students? Three rounds of ultra-difficult “Aru-Nashi” quizzes!
Super difficult 'Aru-Nashi' quiz

A “Yes/No” quiz that tackles the theme of “It’s in XX, but not in YY.” Let’s take on ultra-difficult quiz questions that are often posed in simple forms.

You sort various items—such as two-character kanji or tools—into ‘has’ and ‘doesn’t have’ groups in sequence, then deduce an answer that fits the condition.

When only one item is revealed at a time, the difficulty is high, but as more items appear, it gradually becomes easier to solve.

You can set a time limit, or keep sorting into ‘has’ and ‘doesn’t have’ until the respondent figures it out—either way, it’s a fun and challenging puzzle.

[Difficult] Logic Puzzle: The Three Captives and a Number

Challenging Logic Quiz: The Three Prisoners and the Numbers [Yukkuri Explanation]
[Difficult] Logic Puzzle: The Three Captives and a Number

“The Three Captives and the Numbers” is a quiz that requires logical thinking! A, B, and C are held in separate rooms, and in each room there is a slip of paper with a number from 1 to 9 written on it.

The numbers do not repeat, and no one knows which number is in which room.

A and B ask questions and receive the hints that the sum of the numbers is not even and is not a prime number.

Given that C has the number 5 in their room, what question should C ask? Can you stay calm, organize your thoughts, and arrive at the correct answer?

10 Riddles That Will Definitely Make You Feel Refreshed When You Get Them!

Riddles: Ten riddle questions that will definitely feel super satisfying and refreshing once you get that aha! moment.
10 Riddles That Will Definitely Make You Feel Refreshed When You Get Them!

How about challenging yourself with riddles that sharpen your quick thinking and train your imagination? If you can answer within a 20-second time limit, you’re sure to feel refreshed! If you can get it with a hint, it probably means your mind isn’t too rigid yet.

But if you can’t come up with an answer even after thinking for 20 seconds—or even without a time limit—your mind might be a bit stuck.

Flexible thinking is important both at work and in your personal life! If your results weren’t great, your ability to look at things from different angles might be declining.

Nine quizzes to test your brainpower

[Yukkuri Science] 9 Quizzes to Test Your Brainpower [99% of People Can’t Answer]
Nine quizzes to test your brainpower

The nine quizzes to test your brainpower are packed with tough questions that 95% of people can’t answer—and 95% get wrong! Even simple arithmetic can trip you up: think “That’s easy!” and you’ll end up incorrect.

Once you see the answers and methods, you’ll think, “So that’s what it was!” and maybe even roll your eyes at yourself.

There are plenty of moments in daily life where careful thinking would make things clear.

Train your brain with these quizzes, and you might just cut down on simple mistakes and misunderstandings!

Five tough riddles that hinge on flexible thinking! Give your brain a workout with these puzzle challenges.

[Riddle] Five challenging quizzes that hinge on flexible thinking! Try some brain training with puzzle solving.
Five tough riddles that hinge on flexible thinking! Give your brain a workout with these puzzle challenges.

This one is quite difficult too, and you really have to think flexibly to come up with an answer.

The easy-to-understand illustration creates a preconception, and even though it’s supposed to be clear, it ends up causing confusion instead.

Can you answer without being misled by the illustration?

26 fun riddles that everyone can enjoy, from kids to adults!

[Riddle] 26 fun riddles that kids and adults can enjoy!
26 fun riddles that everyone can enjoy, from kids to adults!

A simple and fun collection of riddles you can enjoy.

As the title suggests, these riddles are enjoyable for everyone from kids to adults, and are perfect for parents and children to play together.

It says the thinking time is 15 seconds, but if you’re enjoying it with younger children, you can pause the video so you can take your time and think together.

If you loosen up and think straightforwardly, the answers might come to you in a flash.

Great for short breaks, a bit of brain exercise, or relaxation time.

[Witty Riddle Quiz] Twist your mind to find the right answers—6 questions in total!

[Witty Riddle Quiz] Twist your mind to find the right answers—6 questions in total!
[Witty Riddle Quiz] Twist your mind to find the right answers—6 questions in total!

A collection of slightly unexpected, offbeat questions.

Loosen up your thinking and take on these twisted problems.

Even when you get the right answer, there’s a lingering sense of mystery—an intriguing set of puzzles.

Recommended for times when you want to focus your mind on one thing!

Try these fun riddles where inspiration is the key! How many can you solve? Can you think like a genius?

[Difficult Quiz] Try these fun riddles where flashes of insight are the key! How many can you solve? Can you think like a genius?
Try these fun riddles where inspiration is the key! How many can you solve? Can you think like a genius?

When the thinking time ends, a whistle goes “beep,” and you’ll definitely find yourself wishing for a little more time—these are tough questions.

You’ll need flexible thinking that considers things from various perspectives.

There are plenty of riddles everyone can enjoy together!