A collection of challenging quizzes for adults [Difficult]
Feeling the urge to tackle a brain-busting puzzle that seems impossible—“No one could solve this!”—might be a uniquely adult kind of curiosity.
But why do puzzles and riddles that hinge on sudden insight make your heart race? It’s because your brain is seeking that moment of activation.
This time, we’ve handpicked challenging problems for adults that test flexible thinking and ideas unconstrained by common sense.
Don’t overthink them—try looking from a slightly different angle.
The “aha!” moment is surely waiting for you.
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High-difficulty riddles, trick quizzes, and visual illusion problems (1–10)
A trick quiz that you’re guaranteed to get wrong if you think about it in a common-sense way
This is a collection of trick questions that reportedly fool 80% of people.
If you approach them like ordinary quizzes, you’ll end up getting them wrong.
You have 20 seconds to think, but many might find 20 seconds tough.
Some questions even contain the answers within the text if you read carefully.
It’s easy to miss that, but try examining the questions from every angle with a skeptical eye.
There are five questions in total, and solving them all is quite satisfying!
A quiz that 99% of adults can’t solve
Let’s not get fooled by trick questions! Here are some ideas for quizzes that 99% of adults can’t solve.
Children’s thinking is free and flexible, but as adults, our thoughts tend to become rigid due to common sense and experience.
These are quiz ideas we’d love you to try when you’re a bit tired or want a change of pace.
If you consider the intent of the question but also answer honestly, you might be surprised at how quickly you can solve them.
Try tackling them on your own, or give them a go with friends and family.
An optical illusion quiz that only geniuses can see
Let’s broaden our perspective! Here are some ideas for an optical illusion quiz that only geniuses can solve.
How about trying some unique questions that use trick art? There are eight questions in total, each with a 10-second time limit.
If you keep your mind flexible, you might suddenly have an “aha!” moment.
In addition to the questions and answers, there are explanations, so once you see the solution, it should all click into place.
Give it a try casually!
Maze quiz using optical illusions
A unique maze that looks simple! Here are some maze quiz ideas that use optical illusions.
Maybe you loved maze puzzles in picture books as a child, or perhaps you still enjoy tackling mazes today.
For those people, these maze quiz ideas that use visual illusions are highly recommended.
Try pausing the video as you take on the challenge—you’ll find the goal is surprisingly hard to reach! It helps to visualize it in 3D in your mind as you work.
It may look easy, but the sensation of the goal getting farther away is fascinating, isn’t it?
Let’s find what’s strange!
This is a game where you look at a picture and point out what’s strange about it.
Even if the picture doesn’t look odd at first glance, there are many kinds of oddities, such as things that are logically inconsistent or drawing mistakes.
Once you start doubting, there’s no end to it, but because it requires checking from multiple angles, it might be perfect for brain training.
Hidden picture quiz for adults
Do you know hidden picture quizzes? They’re quizzes themed around finding a different image concealed within a single picture—either you search for the hidden images or pick, from given choices, the one that isn’t hidden in the picture.
It might sound easy when you read the description, but once you try it, it’s surprisingly tricky! Carefully staring at one picture and searching for other images inside it makes you feel like you’re firing up parts of your brain you don’t usually use.
You might get so absorbed that time flies by before you know it.
A brain teaser quiz that requires outside-the-box thinking
When you think of riddles and witty solutions, some of you might picture Ikkyu-san.
There was even an animated TV show about him, right? Faced with tricky problems—like a sign by a bridge over a river that says, “Do not cross this bridge”—Ikkyu-san would solve them with clever wit.
This wit, which is practically synonymous with Ikkyu-san, is said to mean wisdom that comes to you on the spot, suited to the situation.
The quiz we’re introducing this time will also require some smarts.
Read each question carefully and think from different angles.
You might solve it by rearranging letters, or it could involve two words with the same meaning.
Use the right kind of wisdom for each question and work your way through them.
