[Interesting] Collection of Math Quiz Problems

How many horse mackerel are there?

[Challenging Math Quiz] Take on the challenge for elementary students! A Japan Math Olympiad-style problem that tests your mathematical sense: 'How many horse mackerel are there?' (IQ puzzle, brain training, mental exercise)

This is a problem that appeared in a past Arithmetic Olympiad.

You buy some fish and are asked to find how many horse mackerel (aji) are among them.

Although it’s aimed at elementary school students, it’s quite difficult, and many adults may struggle with it.

If you understand the difference between the other fish and the horse mackerel, and why you only need to know the price of the horse mackerel, you should be able to set up the equation.

You can take your time to think it through on your own, or, if you have children, why not try tackling the problem together?

What are the digits from 1 to 9 that go in the boxes?

[Arithmetic Quiz] Fill the squares with numbers 1–9! Three classic arithmetic puzzles, plus a bonus question [Math Puzzle]

This is a puzzle where you fill the boxes with the digits 1–9 to make equations.

The problems are relatively difficult, so take your time working through them.

The sense of clarity you get when you solve one is indescribable.

Try mobilizing all your math knowledge to take on the challenge.

The final problem is extremely difficult.

What’s especially important are odd and even numbers.

You’ll use easy-to-forget facts like “What happens when you add an odd number to an odd number?” and “What happens when you add an even number to an odd number?” If you figure it out, you might be a genius.

Aim to become a math master.

Arithmetic Puzzle

Tsurusaki goes on a rampage! Lightning-fast solutions to a math puzzle so wild even Fukura P can’t keep up

Speaking of math quizzes, many people also think of arithmetic puzzles.

Arithmetic puzzles are those where numbers are placed in a grid, and you fill in pluses, minuses, or numbers.

There are also ones where you find the area of a shape or complete a figure.

Since they’re similar to math problems, try tackling them while recalling your school lessons.

Another appeal of math quizzes is that there are plenty of books, videos, and games that compile problems.

Try finding the ones you like.

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Where did the 100 yen go?

[Challenging IQ Test] The smarter you are, the harder it is?! “Where did the 100 yen go?” “The Disappearing 100 Yen” [Brain Training][Brain Teaser] With Explanations

This is a very famous problem that incorporates mathematical elements.

It’s similar to a puzzle or brain teaser, and there are various versions besides the one introduced here.

If you carefully track how much money the three college students checking into a hotel, the bellboy, and the manager each have, you may reach the correct answer more quickly.

Although it’s well-known, it’s also very difficult, so rather than tackling it alone, it might be more satisfying to solve it with friends and enjoy the process together.

Mathematics in the Edo period

[In ink] The theory that University of Tokyo grads could easily handle Edo-period mathematics [with a brush]

When you want to liven things up with a unique quiz, Edo-period math quizzes are highly recommended.

In this format, you answer questions as if you’ve time-traveled back to the Edo period.

The basic structure of the problems is the same as today, but apples might be swapped out for straw rice bales, and so on.

Enjoy these playful touches as you take on the challenge.

To enhance the Edo-period atmosphere, it could be fun to write equations with a brush on paper or to use Edo-style sentence endings.

You could also adapt the idea to create quizzes themed around other historical periods.

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Perimeter problems for first-grade elementary school students

Let’s introduce a perimeter problem for first graders.

This one asks you to find the total perimeter of a U-shaped figure.

Even adults might find it a bit challenging.

The difficulty is just right, so it could be fun to tackle it together as a parent and child.

By the way, there are also unique perimeter problems like “finding the Earth’s total circumference.” Because it’s a bit unusual, it should feel fresh and engaging.

If you’d like to try more, search on YouTube or social media.

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What’s the real order by height?

[Arithmetic Olympiad] Problems that smart elementary school students are solving! Can you solve them? (Logic Puzzle / Math Quiz) brain plus*

A logic puzzle about arranging people in order of height.

It’s a trial problem from the 2020 Junior Mathematical Olympiad.

Someone is lying, and the challenge is to spot the lie and solve it—your classic format.

Don’t underestimate it just because elementary school students tackle it.

Without taking time to think, it’s hard to reach the correct answer.

Focusing on the problem’s absolute conditions and identifying contradictions in the statements is the shortcut to the solution.

Problems like this sometimes appear in job aptitude tests as well, so students might want to get used to them.