[Satisfying When Solved] Challenging Quizzes Recommended for Elementary School Students!
For all elementary school students who love quizzes, we’re introducing a whole bunch of tough questions this time!
If regular quizzes are a breeze for you and you’re looking for a new challenge, give these a try.
We’ve gathered quizzes ranging from Math Olympiad problems and entrance exam questions from competitive junior high schools to puzzle-like brainteasers and tricky riddles.
With every question, once you see the answer you’ll think, “Oh, that’s what it was!”—and maybe feel a bit frustrated—but we believe it’s a great way to discover how fun learning can be.
If you find a quiz you like, we also recommend sharing it with everyone at school.
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[Satisfying When You Solve Them] Challenging Riddles for Elementary Schoolers! (21–30)
[Math Quiz] Using 4-minute and 7-minute hourglasses, measure 9 minutes.
![[Math Quiz] Using 4-minute and 7-minute hourglasses, measure 9 minutes.](https://i.ytimg.com/vi/exODWA1SVKk/sddefault.jpg)
It’s a simple yet tricky puzzle: using a 4-minute and a 7-minute hourglass, measure 9 minutes.
If you just use the 4-minute and 7-minute hourglasses, a total of 11 minutes would pass.
So the key to this problem is how to measure 7 minutes.
For those who are having trouble finding the answer, here’s a hint.
If you flip both the 4-minute and 7-minute hourglasses at the same time, the 4-minute hourglass will run out first.
At that point, the 7-minute hourglass will have 3 minutes’ worth of sand remaining.
[Math Quiz] What number goes in the blank?
![[Math Quiz] What number goes in the blank?](https://i.ytimg.com/vi/KMFEt9vECOM/sddefault.jpg)
Do you know the Arithmetic (Math) Olympiad, where people around the world compete in their mathematical abilities? Here’s a fill-in-the-blank problem from the 2019 trial that lets you experience its atmosphere.
You’re given a grid with 4 rows and 7 columns.
It contains the numbers 1 through 5, but three cells near the center are blank—try filling them in.
What makes this problem interesting is that it doesn’t rely on adding or dividing numbers; it calls for a flash of insight.
Matchstick puzzle: Move one stick to make it half.
See the answer
If you move the bottom matchstick of the 0 to below the space between the 1 and 0 and change its orientation, it becomes a “5.”
Because it’s half of ten, I can at least think to somehow make the shape of a “5,” but how should I move it? There’s no restriction saying “you mustn’t change the orientation,” so the shift in thinking to “let’s try changing the orientation!” is the key to solving the problem. Still, it’s a really well-crafted puzzle. I’d love to pose it to friends in my class who enjoy quizzes.
30 trick riddles that 80% of people can’t solve
Let’s play with words! Here are 30 ideas for trick riddles that 80% of people can’t solve.
Trick riddles can leave you feeling stumped, but seeing the answer often makes you think, “Ah, I get it now!” or “So that’s how it works!” This time, let’s take on riddles said to be unsolvable for 80% of people.
For example, one question goes: “One day, a precious musical instrument broke and could no longer be used.
What instrument was it?”
Matchstick puzzle: Move 2 sticks to change the direction of the goldfish.
See the answer
Move the two sticks at the bottom right to make the goldfish face upward.
When we see the phrase “change direction,” we tend to assume it means “turn 180 degrees”—right to left, up to down, and so on. If someone said “either up or down is fine” for this problem, it would click right away, wouldn’t it? Still, it’s kind of curious that with just this many matchsticks, the figure can look like a goldfish.
[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!
Junior high school entrance exam geometry problems
Since it’s a geometry problem from a junior high school entrance exam, it’s genuinely difficult.
I think children who overcome such hurdles and pass are truly admirable.
I’m also curious about what kind of adults those who solved problems like this and got accepted will become in the future.
There were no children around me who took such competitive junior high school exams (lol).
I feel like I could never compete with kids who are so good at solving problems like these.