Mental Workout: Casual Challenge! Riddles for Adults
How do you all kill time?
Using your smartphone for the internet or games is the go-to, but even then, there are times when you get bored if you keep doing it, right?
Still, just spacing out and waiting for time to pass doesn’t feel great either.
So how about this: let’s go back to our childhood selves and try some riddles.
I’ve put together questions that should be relatively easy, so give them a shot as a light mental workout.
Some are more like quizzes that require a bit of knowledge, so you might even learn something!
- [Brain Training] Difficult Riddles That Even Adults Struggle With
- [Challenging and Fun!] Quizzes & Riddles for Adults
- [Trick Quiz] Quiz Questions That Excite Everyone from Kids to Adults
- A quiz that seems easy but is actually hard: trick questions that make you think flexibly
- [Battle of Wits] Stimulate your intellectual curiosity! Quiz questions that get adults excited
- [Interesting] A collection of brain teaser quiz questions. Let's train your brain!
- Interesting riddles: a collection of simple and fun questions
- Quiz for junior high school students
- A math quiz for adults. Can you solve it?
- Fun Quiz Questions That Will Liven Up the Office [2026]
- Do you get tripped up too? A fun roundup of 10-time quiz questions
- Take on the challenge like a puzzle! A collection of logic quizzes that also work as brain teasers.
- [Simple Riddles] A curated selection of fun questions that will excite everyone from kids to adults!
[Brain Teasers] Try them casually! Riddles for adults (11–20)
Riddle Challenge: 57 Questions
This quiz consists of a continuous series of 57 riddles.
By answering one after another in a short span of time, your brain gets trained and activated.
The questions range from tricky types to straightforward ones, so a neutral state of mind is required.
As you keep solving them, you’ll gradually get into the rhythm and find it easier to get the right answers.
Keep at it until you reach that point.
The lid on your mind is about to pop open.
Intermediate riddles
This quiz is a treasure trove of benefits: it helps prevent cognitive decline, rejuvenates your brain by eight years, and boosts academic performance.
It’s a set of medium-level riddles recommended for those who feel that, as adults, their thinking has become less flexible and life has gotten a bit dull.
By changing the way you look at things, your everyday life becomes a little more enjoyable.
Hints are provided along the way, making it perfect for adult brains that have gotten a bit rigid.
There are several installments, so try them when you have free time and activate your mind.
Riddles that even kindergarteners can understand
This time, I’m going to share some really simple riddles.
They’re so easy that even kindergarteners can solve them! Putting aside the fact that this might actually make it more pressure, give them a try first.
Success builds growth, so do your best to get every question right!
The smarter you are, the harder it is to solve?! “Where did the 100 yen go?” / “The Missing 100 Yen”
A quiz with a slightly mysterious vibe about the “missing 100 yen.” Tricks like this might actually be everywhere in everyday life.
If you’re led in the wrong direction, you’ll lose sight of the answer, but if you simply check the wording and the numbers, you’ll notice what’s off.
There’s also an answer and explanation provided after “END,” so even if you couldn’t solve it, don’t worry.
Don’t fall for the trick!
Here is a quiz that’s known as a tricky riddle.
If you focus too hard on the problem, you might miss an important hint.
Be sure to look carefully at the whole picture.
Also, by viewing the problem broadly, your brain becomes more active than with ordinary questions, which can help prevent cognitive decline.
In everyday life, too, if you avoid narrowing your perspective and making assumptions, looking at the bigger picture might change your life.
Use this quiz as a hint and enjoy your days!