[Interesting] A collection of brain teaser quiz questions. Let's train your brain!
Have you ever thought, “My thinking ability has declined lately,” or “I’ve been making a lot of careless mistakes”? Maybe you’ve been more forgetful, too.
In times like that, how about trying some brain exercises or quizzes? We’ve gathered a wide variety of quiz questions and brain teasers, from easy ones to slightly more difficult ones.
Some are quick enough to do in a short spare moment.
With brain-training quizzes, the value lies in the act of thinking itself, even if you don’t get the right answer—so give them a try!
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[Interesting] A collection of brain-teaser quiz questions. Let's train your brain! (11–20)
12 Trick Questions

Trick questions that are well known as brain teasers.
They don’t just train your attention; they also put a little stress on your brain, so they’re recommended if you want to wake your mind up.
They’re all problems you can solve if you think them through properly, making them perfect for killing time.
Some answers might make you want to protest, but try them as a mental workout.
Brain Teasers

This is a quiz recommended for those who prefer tougher problems over easy ones.
The answers might make you a bit annoyed, but that’s the nature of riddles.
If you think it through, you might have an “aha!” moment.
There may be some easy questions mixed in, and when that happens, feel free to show off with a smug grin.
Mystery Quiz

This quiz is recommended for fans of mystery novels and dramas.
It trains your thinking by having you deduce reasons and theories from events that occurred.
Solve it as if you were a detective, and you’ll feel like Conan.
Yes, there is always only one truth! Uncover the real story with your own hands.
Brain Training Workbook

This is a collection of quizzes featuring classic brain-training questions.
Since it includes many standard quizzes commonly seen in various places, it might be a bit easy for avid quiz fans.
As you’d expect from classics, many answers feel satisfying once you see them.
Even if you don’t usually solve quizzes, you can build your quiz skills—so give it a try!
Suspense Quiz

A quiz recommended for fans of suspense dramas and mystery novels.
Since the theme is suspense, you can tackle the quiz as if you’re watching a drama.
It’s a mix of crime-themed riddles and puzzles, so people of all kinds can enjoy it.
If you like detective-style reasoning, have some free time, or want to train your attention to detail, give it a try.


