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? (1–10)
Let’s try to find the height of the building.
It seems easy but isn’t… This is a math quiz that plays tricks on your eyes.
A child stands on top of a building and an adult stands on the ground; the height from head to head is 5 meters.
Next, an adult stands on top of the building and a child stands on the ground; the height from head to head is 6 meters.
So, what is the height of the building? You might first be confused, wondering, “Why does the height change just by swapping the child and the adult?” The key to solving it is to stack the two diagrams one above the other!
Square Puzzle
This is an arithmetic puzzle where you find the area of a smaller quadrilateral drawn inside a square.
Looking only at the diagram, with lines drawn diagonally across the square, you might wonder, “How am I supposed to solve this?” The key to the problem is that the inner figure is formed by lines connecting the vertices and the trisection points of each side.
If you shift and extract parts of the figure to turn it into a different, easier-to-calculate shape, the answer should naturally follow.
Approach it with flexible thinking!
A pattern-recognition challenge you want to notice within 10 seconds!
Even the calculus I was good at in my student days becomes something I hardly use… but putting the difficult talk aside, how about trying a brain teaser: a “pattern recognition problem”? For example, what number do you think comes after 1, 1, 2, 3, 5, 8? The answer is 13.
This is the famous Fibonacci sequence, where each number is the sum of the two preceding ones.
It’s sometimes taught in high school math.
Another one: what comes after 1, 4, 9, 16? The answer is 25.
They’re all perfect squares.
Enjoy it while reminiscing about the old days.
10% correct answer rate! A puzzle you can’t solve if you’re too rigid-headed!
As a math quiz that tests your creativity, I recommend these tricky riddles that you can’t solve with a rigid mindset.
This one is a tough problem with a correct-answer rate of just 10%.
You’re asked to create equations with flexible thinking.
At the same time, it also tests your computational skills, so it makes sense that only 10% get it right.
The difficulty is quite high, making it perfect for stumping your friends.
If they really can’t solve it, give them a hint.
And don’t forget to prepare some scratch paper.
Fourth-grade math that becomes harder to solve the more you grow up
Here’s something I’d love parents with elementary school children to try.
At first glance, multiplying fractions looks simple, but if you don’t remember the method and rules, it can be surprisingly tricky.
Your child, who’s currently learning it, might breeze through it more easily than you do.
This could be a great chance to borrow their math textbook and try a few problems that catch your eye—it can actually be fun.
It should also spark conversations with your child.
Give it a try as a new family activity!