How many can you solve? Brain-flexing math riddle quiz

[Math Quiz] How many balls are there in total?

1-minute arithmetic quiz #MagicalQuiz #Quiz #MathQuiz #LogicQuiz

Would you like to try a quiz where you guess the total number of balls? In this puzzle, balls are arranged in a square and stacked in four layers, and you’re asked to give the total number as seen from directly above.

If you try to count them at a glance, the fourth layer hides the balls in the lower layers, so it doesn’t work well.

In other words, you need to figure out how many balls are in the parts you can’t see.

Here’s a hint: first, determine how many balls make up the square on the first layer.

You should be able to find it by counting the number of balls along the length and the width.

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[Math Quiz] 5-Yen Coin Savings

[Arithmetic Quiz] Looks easy but a bit tricky! Brain training and IQ boost with math problems! “5-Yen Coin Savings”

This is a 5-yen coin saving quiz that’s also effective as brain training.

In this quiz, there’s a boy who saves 5 yen every day.

Since his piggy bank was small, he would exchange coins as follows: when he had two 5-yen coins, he exchanged them for a 10-yen coin; when he had five 10-yen coins, he exchanged them for a 50-yen coin; when he had two 50-yen coins, he exchanged them for a 100-yen coin; and when he had five 100-yen coins, he exchanged them for a 500-yen coin.

Based on these conditions, let’s determine the coin amounts at specific counts.

The trick is to think in terms of the smallest possible denominations.

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Puzzle: What word can be found by calculation?

[Puzzle] Do elementary schoolers solve it faster? A math riddle! [Question 48]

Puzzle-solving games are fun, aren’t they? So let me introduce a math quiz with a strong puzzle-solving element.

You’ll be given several equations with answers, plus a fill-in-the-blank sentence.

First, solve the equations and draw lines connecting each equation to its answer.

Then, figure out the letters that go into the blanks.

The real twist of this problem is that solving the equations alone won’t give you the answer.

The hint lies in the shapes of the lines connecting the equations to the answers.

Look very closely—you’ll see a certain letter emerge.

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Shape Quiz

Make your brain 80% sharper!? Shape Quiz!

Shape puzzles are really fascinating, aren’t they? It’s so much fun to discover rules that aren’t obvious at first glance, and you can’t help but get absorbed in them.

Elementary school students can probably solve them with more flexible thinking than adults! Be sure to read the questions carefully so you don’t miss any hints.

That “Aha!” moment when you figure out the answer is such a great feeling.

Solving shape puzzles really boosts your thinking and reasoning skills.

It’s also fun to work on them together, so definitely try tackling lots of different problems!

Insert ‘+’, ‘-‘, ‘×’, and ‘÷’ to complete the equation!

Arithmetic Quiz [Here’s the question] Kyoto University Graduate Instructor Ayamero #Quiz

Let me introduce a relatively basic fill-in-the-blank puzzle.

You’re given blanks and numbers, and your task is to insert +, −, ×, or ÷ to complete the equation.

It’s not just about calculating—the key is flexible thinking.

By the way, this type of fill-in-the-blank quiz appears in various problems on YouTube and in books.

It’s perfectly fine to enjoy using those.

Some of them even ask you to complete quite complex equations.

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