Category Sort
1 / 15Can you spot the odd one out? Given a group of items, identify which one does NOT belong to the same category!
15 quick questionsNo sign-upFree to playTap an answer below to begin ↓
Which of these is NOT a fruit?
About Category Sort
Give your memory a workout with Category Sort: 15 multiple-choice questions with a mix of 5 easy, 5 medium, 5 hard questions, free to play right in your browser. Can you spot the odd one out? Given a group of items, identify which one does NOT belong to the same category! Expect to spend about 7 minutes; every question comes with an explanation, so you learn something even when you miss.
A few sample questions
1. Which of these is NOT a fruit?
Answer: Celery
Celery is a vegetable, while apple, banana, and grape are all fruits.
2. Which of these is NOT a planet in our solar system?
Answer: Polaris
Polaris is a star (the North Star), while Mars, Jupiter, and Saturn are all planets.
3. Which of these is NOT a string instrument?
Answer: Trumpet
Trumpet is a brass instrument, while violin, cello, and harp are all string instruments.
4. Which of these is NOT a mammal?
Answer: Eagle
Eagle is a bird, while dolphin, elephant, and whale are all mammals.
5. Which of these is NOT a primary color in painting?
Answer: Green
Green is a secondary color (made by mixing blue and yellow). The primary colors in painting are red, blue, and yellow.
Things you'll learn along the way
- Portugal is in Europe, while Brazil, Argentina, and Colombia are all in South America.
- Focaccia is a type of flatbread, while penne, rigatoni, and farfalle are all pasta shapes.
- The Mediterranean is a sea, not an ocean. The Atlantic, Pacific, and Indian are three of the world's oceans.
Frequently asked questions
Will I lose my progress if I close the page?
Your overall progress — XP, streaks, and badges — is saved in your browser automatically. A quiz that's underway restarts if you leave mid-game, but at about 7 minutes, Category Sort fits comfortably in one sitting.
How many questions are in Category Sort?
Category Sort has 15 multiple-choice questions. Each one has four answer options and an explanation that appears after you answer, so you learn something even when you miss.
Is Category Sort free to play?
Yes. The entire SeniorBrainGames catalog — including Category Sort — is free, with no sign-up required, no time limits, and no ads on top of the game. It also works offline once the page has loaded once.
How long does Category Sort take?
Most players finish Category Sort in about 7 minutes. You can pause between questions, replay it as often as you like, and there is no penalty for taking your time — answers are explained after you submit them.
Explore related topics
More Memory Games
Odd One Out
Three items belong together and one doesn't. Can you spot the odd one out?
What's Changed?
Study the items carefully, then figure out which one disappeared!
What's Missing?
Study the items carefully, then figure out which one disappeared!
Color & Shape Sorting
Sort items into the correct categories!
Holiday Spot the Difference
Every round is a celebration — but one festive detail always changes!
Try Nostalgia Trivia
Timeline Sort
Put historical events in the correct chronological order!
Try Nostalgia Trivia
Vintage Spot the Difference
Study the old-time treasures, then spot which one quietly changed!
Free printables
Printable Sudoku
Large-print sudoku sheets to print at home — with answers.