[Brain Activation for Seniors] How about enjoying a fun mental workout with a fish kanji quiz?
I’ve put together a collection of slightly challenging riddles for college students.
Even students who study regularly might find them a bit tricky.
Whether you try them alone or have fun with friends at school, I think they’ll be a hit.
Hope you enjoy them!
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- [Hard] Riddles for junior high school students
- Fun Quiz Questions That Will Liven Up the Office [2026]
- [Satisfying When Solved] Challenging Quizzes Recommended for Elementary School Students!
[Elderly Brain Activation] Want to enjoy a fun mental workout with a Fish Kanji Quiz? (11–20)
Prefecture Name Riddles
Here are 20 silly but funny riddles that use the names of Japan’s prefectures.
They’re really ridiculous, but somehow you still feel a little happy when your home prefecture shows up—strange, isn’t it? Well, putting that aside, I definitely want all university students to give them a try.
A riddle that kids can solve but adults cannot
You can’t just sit back when someone says, “Riddles kids can solve but adults can’t,” right? University students, there are 16 questions in total—aim for a complete sweep and give it a try.
I want to see you show that college students are impressive and capable.
A riddle: Draw three straight lines to make nine triangles
It’s a riddle where you draw three straight lines to make nine triangles.
Once you get stuck, it’s hard to arrive at the answer.
Since you can draw the lines anywhere, there are many possibilities.
The hint is: three lines make nine triangles, but if you think differently, you can see it as one line making three triangles—once you realize that, it’s easy.
10 crime riddles
Here’s a riddle presented in a story format with cute animations and stylish design.
It might be a bit difficult, but university students should definitely try tackling it together with classmates.
Solving each step of the puzzle brings both thrills and excitement!
12 riddles that geniuses can solve easily
With a tagline like “Only a genius can do it,” you can’t help but take on the challenge, right? This video also features cleverly cute animations during the questions, so you’re sure to have a great time.
It could be fun to compete with friends to see how many problems you can solve.