A math quiz for adults. Can you solve it?
In this article, we’re showcasing plenty of math quizzes that we want adults to try!
We’ve gathered everything from puzzles you can solve with a flash of insight—but can be tricky if you’re too rigid—to serious problems that have appeared in the Math Olympiad.
They’re perfect for killing time and training your brain.
You can enjoy them with other math-loving adults, or challenge your child to see who can solve them faster—it sounds fun either way.
Give them a try with a game-like mindset!
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Math quiz for adults. Can you solve it? (21–30)
Four-digit addition anyone can do
Even calculations that seem difficult at first glance can sometimes be solved quickly if you know the trick.
Apparently, you can get the answer just by adding the third and fourth numbers out of the six lines.
This puzzle can even be used for magic tricks, so be sure to check it out and try it yourself.
Numbers may seem simple, but they’re surprisingly deep…
An arithmetic problem that elementary school students can solve but adults cannot
In fact, these are arithmetic problems from junior high school entrance exams that elementary school students are expected to solve.
They’re the kind of tough questions that make you want to say, “Are these really for elementary school kids?” They really get your brain working and make for great mental training, so let’s do our best to figure out the answers.
[Arithmetic Olympiad Super-Challenge] What is the perimeter of the rectangle?
![[Arithmetic Olympiad Super-Challenge] What is the perimeter of the rectangle?](https://i.ytimg.com/vi/AzAGNc7T9j4/sddefault.jpg)
At first glance, the perimeter here looks difficult to figure out, but since the light green shape inside is a square, you can easily find the answer by setting up an equation: let the side length of the square be ○, let the part obtained by subtracting the square’s side from 12 cm be □, and the part obtained by subtracting the square’s side from 9 cm be △.
For problems that seem hard, it’s a good idea to try replacing numbers with symbols and see if you can simplify your approach.
Give it a try!
Kanji Calculation Quiz
This kanji calculation quiz requires both arithmetic skills and knowledge of kanji.
This particular problem is on the easier side, but it seems fun to try various calculations that follow this rule.
A composite problem like this is likely to stimulate different parts of the brain, so it should be very helpful for keeping your mind active.
Give it a try!
Make 10 using four numbers and (+ − × ÷)
At first glance, you might think, “Hey, this looks easy!” but it’s actually quite difficult.
In this video, we’ve picked three tough problems that each have only one solution.
They’re challenging, but if you solve them, it’ll surely feel great!