Take on the challenge like a puzzle! A collection of logic quizzes that also work as brain teasers.
A set of logic riddles that let you tackle problems with the mindset of a master detective.
Enjoy quizzes that appeal to all ages, from children to adults!
Many of the questions aren’t easy to solve by just reading the text as-is—you’ll often need a flash of insight and creative thinking.
Thinking about the precise meanings of words or jotting things down on paper or a board may lead you to the correct answer.
There are plenty of humorous questions too, so they’re great for brain exercises or recreational activities.
Give them a try—from casual, easy puzzles to more difficult challenges!
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Challenge yourself with a puzzle-solving vibe! A collection of logic riddles that also work as brain teasers (1–10)
Among Natsuko, Kanako, and Hitomi, who is the one that animals always dislike?
See the answer
Hitomi
Only Hitomi-san doesn’t have the “na.” You can solve the problem if you arrive at the unique idea that animals won’t become attached. The key is to deduce that the fact that three names are listed contains a hidden clue.
Okinawa Prefecture doesn’t have any trains running, yet it’s said there’s a railroad crossing in one place. Where could that be?
See the answer
driving school
At driving schools for getting a car license, there are railroad crossings used in lessons to learn traffic rules, right? The trick is to think with a broad perspective without getting hung up on the phrase “train crossing.”
Who is person A, who is male when alone but becomes female when with others?
See the answer
husband
Husband alone becomes a man, but when the kanji for person is added, it becomes wife. The key is to convert to kanji without delving deeply into the meaning of the words from the problem statement. It’s a logic puzzle you can solve by expressing man and woman in different ways.
Challenge yourself like a puzzle! A collection of logic riddles that also train your brain (11–20)
It’s said that people who dislike a certain food will smile when they hear its name. What is this food that makes them smile?
See the answer
cheese
There’s a hint hidden in the words people say when a camera is pointed at them for a photo. It’s the problem where you end up making a smile at the cue of “Say cheese.” You can get the right answer by reading the question from a different angle instead of taking it at face value.
The ballpoint pen and eraser cost 110 yen in total, and the ballpoint pen is 100 yen more expensive than the eraser. How much does the eraser cost?
See the answer
5 yen
If you read the problem statement as is, it’s a quiz that makes you want to answer that the eraser costs 10 yen. If the eraser costs 10 yen, then adding the 110 yen for the ballpoint pen gives 120 yen. Since we need prices that add up to 110 yen for the eraser and the ballpoint pen together, the correct answer is that the eraser costs 5 yen and the ballpoint pen costs 105 yen.
While a police officer was on patrol, a truck driver went the wrong way down a one-way street right in front of them. The officer didn’t care at all and simply walked away. Why was that?
See the answer
Because I walked the wrong way down a one-way street
A one-way sign applies only to vehicles. There’s no problem if a person walks in the opposite direction, right? The key is to approach it flexibly instead of assuming the truck driver drove the wrong way.
When Mr. A, who works at an advertising company, arrived at the office, he found a sheet of paper pinned to the company bulletin board with drawings of a pudding, an octopus, and a bottle of shochu. Was Mr. A able to carry out his work smoothly that day?
See the answer
did not progress
Combining pudding (purin), octopus (tako), and the word “out of order” (koshō-chū) gives you “printer out of order” (purinta koshō-chū). Since you need a printer to print advertisements, the task won’t go smoothly. The trick to solving the puzzle is noticing the pun-like word connections.